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    Wyświetlanie 1-13 z 13
    Tytuł:
    Effect of Chemical Composition of the Matrix on AlSi/SiCp+Cp Composite Structure
    Autorzy:
    Dolata, A. J.
    Dyzia, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380736.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative materials
    castings defects
    aluminium composite structure
    innowacyjne technologie odlewnicze
    materiały innowacyjne
    wady odlewów
    Opis:
    The casting processes using mechanical stirring of composite suspension are considered for the most economical methods for manufacturing of metal matrix composites in the application and industrial practice. The most common problems during the composite suspensions production include: weak wetting between liquid Al alloy and ceramic particles and gassing of composite mixtures resulting with introducing the particles into aluminium alloy and long-term stirring process. The agglomerates and clusters of particles created among others as an effect of gas blisters absorption on the surface of ceramics causes discontinuity of composite structure and thereby they reduce properties of final products. The porosity has disadvantageous effect on mechanical properties of products, it reduces the corrosion and wear resistance, particularly under technically dry friction conditions. Therefore, to produced the casts composite possessed optimal properties, it is necessary their minimal porosity. To obtaining a good high-quality castings, the proper selection of components, particularly the chemical composition of the Al matrix and the kind of reinforcement are necessary. In this paper, the effect of chemical composition of the matrix on AlSi/SiCp+Cp composite structure were presented.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1 spec.; 135-138
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Granulation of Cu-Al-Fe-Ni Bronze
    Autorzy:
    Pisarek, B. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/381371.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative materials
    aluminium bronze
    granulation
    sieve analysis
    microstructure
    microhardness
    innowacyjne technologie odlewnicze
    materiały innowacyjne
    analiza sitowa
    mikrostruktury
    mikrotwardość
    Opis:
    With the increase in wall thickness of the casting of iron-nickel-aluminium-bronze, by the reduction of the cooling rate the size of &κII phase precipitates increases. This process, in the case of complex aluminium bronzes with additions of Cr, Mo and W is increased. Crystallization of big κII phase, during slow cooling of the casting, reduces the concentration of additives introduced to the bronze matrix and hardness. Undertaken research to develop technology of thick-walled products (g> 6 mm) of complex aluminium bronzes. Particular attention was paid to the metallurgy of granules. As a result, a large cooling speed of the alloy, and also high-speed solidification casting a light weight of the granules allows: to avoid micro-and macrosegregation, decreasing the particle size, increase the dispersion of phases in multiphase alloys. Depending on the size granules as possible is to provide finished products with a wall thickness greater than 6 mm by infiltration of liquid alloy of granules (composites). Preliminary studies was conducted using drip method granulate of CuAl10Fe5Ni5 bronze melted in a INDUTHERM-VC 500 D Vacuum Pressure Casting Machine. This bronze is a starting alloy for the preparation of the complex aluminium bronzes with additions of Cr, Mo, W and C or Si. Optimizations of granulation process was carried out. As the process control parameters taken a casting temperature t (°C) and the path h (mm) of free-fall of the metal droplets in the surrounding atmosphere before it is intensively cooled in a container of water. The granulate was subjected to a sieve analysis. For the objective function was assume maximize of the product of Um*n, the percentage weight "Um" and the quantity of granules 'n' in the mesh fraction...
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 61-66
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    3DP Technology for the Manufacture of Molds for Pressure Casting
    Autorzy:
    Skorulski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/383141.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative materials
    innovative casting technologies
    rapid prototyping
    ceramic mold
    pressure casting
    materiały innowacyjne
    innowacyjne technologie odlewnicze
    prototypy
    formy ceramiczne
    odlewanie ciśnieniowe
    Opis:
    The paper presents the use of rapid prototyping technology of three dimensional printing (3DP) to make a prototype shell casting mold. In the first step, for identification purposes, a mold was prepared to enable different alloys to be cast. All molds being cast were designed in a universal CAD environment and printed with the zp151 composite material (Calcium sulfate hemihydrate) with a zb63 binder (2-pyrrolidone). It is designated to be used to prepare colourful models presenting prototypes or casting models and molds. The usefulness of 3DP technology for use with copper alloys, aluminum and zinc was analyzed. The strength of the mold during casting was assumed as a characteristic comparative feature in the material resistance to high temperature, the quality of the resulting casting and its surface roughness. Casting tests were carried out in vacuum – pressure casting. The casting programs applied, significantly increased the quality of castings and enabled precise mold submergence. Significant improvement was noted in the quality compared to the same castings obtained by gravity casting.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 99-102
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Examining the Possibilities of Analyzing the Solidification Process of Al-Si Alloy with the Infrared Camera
    Autorzy:
    Władysiak, R.
    Kozuń, A.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381794.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative materials
    thermography
    TDA
    alloy Al-Si
    microstructure
    innowacyjne technologie odlewnicze
    materiały innowacyjne
    termografia
    stop Al-Si
    mikrostruktura
    Opis:
    The paper presents the results of the crystallization process of silumin by the TDA thermographic method and the results of the cast microstructure obtained in the sampler ATD-10, that was cooling down in ambient air. The study was conducted for silumins AlSi8 and AlSi11 unmodified. The work demonstrated that the use of thermal imaging camera allows for the measurement and recording the solidification process of silumin. Thermal curve was registered with the infrared camera and derivative curve that was calculated on the base of thermal curve have both a very similar shape to adequate them TDA curves obtained from measurements using a thermocouple. Test results by TDA thermographic method enable quantitative analysis of the kinetics of the cooling and solidification process of hypo- and neareutectic silumins.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 1; 89-94
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Silica Sand on Surface Casting Quality
    Autorzy:
    Beňo, J.
    Adamusová, K.
    Merta, V.
    Bajer, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/383370.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative materials
    castings defects
    silica sand
    veining
    COLD-BOX amine
    innowacyjne technologie odlewnicze
    materiały innowacyjne
    wady odlewów
    piasek kwarcowy
    Opis:
    The current casting production of castings brings increased demands for surface and internal quality of the castings. Important factors, that influence the quality of casted components, are the materials used for the manufacture of moulds and cores. For the preparation and production of moulds and cores, in order to achieve a low level of casting defects, then it used a high quality input materials, including various types of sands, modified binders, additives, etc. However, even the most expensive raw materials are not a guarantee to achieve the quality of production. It is always necessary to choose the appropriate combination of input material together with an appropriate proposal for the way of the production, the metallurgical treatment of cast alloy, etc. The aim of this paper is to establish the basic principles for the selection of the base core mixtures components – sands to eliminate defects from the tension, specifically veining. Various silica sand, which are commonly used in foundries of Middle Europe region, were selected and tested.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 5-8
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kształtowanie mikrostruktury i właściwości mechanicznych brązów cynowych
    Shaping the Microstructure and Mechanical Properties of Tin Bronzes
    Autorzy:
    Rzadkosz, S.
    Kozana, J.
    Garbacz-Klempka, A.
    Piękoś, M.
    Cieślak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/381842.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    materiały innowacyjne
    innowacyjne technologie odlewnicze
    brązy cynowe
    miedź
    mikrostruktura
    właściwości mechaniczne
    innovative materials
    innovative technologies foundry
    tin bronzes
    copper
    microstructure
    mechanical properties
    Opis:
    W artykule zaprezentowano wyniki badań nad wybraną grupą stopów z układu Cu-Sn. Przeanalizowano oddziaływanie udziału cyny w brązach cynowych w zakresie od 6 do 30 %. Kontynuując badania zmierzające do uzyskania odpornych na zużycie brązów spoza grup znormalizowanych stopów miedzi, oceniono oddziaływanie dodatku aluminium w stopach Cu-Sn. Przeprowadzono badania metalograficzne zmierzające do określenia mechanizmów oddziaływania zmiennych zawartości dodatków stopowych z uwagi na zmiany podstawowych właściwości mechanicznych. Uzyskane wyniki wskazują na wyraźne zmiany mikrostruktur badanych stopów, jak również wykazują silne utwardzenie stopów Cu-Sn. Zastosowane dodatki aluminium w zakresie do 3 % w wybranych stopach powodują również poprawę właściwości mechanicznych badanych brązów cynowych z dodatkiem aluminium.
    During the research a chosen group of copper - tin alloys were investigated. The influence Sn in tin bronzes was analysed in the broad spectrum between 6 to 30%. Continuing the research aiming at obtaining durable bronzes outside the normalised copper alloys, the influence of chosen aluminium additive in selected Cu-Sn alloys was assessed. Metallographic tests were carried out to determine the operating mechanisms and also the influence of the varied alloying additives from the perspective of changes in the basic properties of the alloys investigated. The obtained results clearly point to the changes in microstructures and mechanical properties of the alloys investigated.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4 spec.; 107-110
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie PLA jako spoiwa w masach formierskich i rdzeniowych
    Application of PLA as a Binder in Molding and Core Sands
    Autorzy:
    Kozłowski, J.
    Kochański, A.
    Perzyk, M.
    Tryznowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381798.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    materiały innowacyjne
    innowacyjne technologie odlewnicze
    biopolimery
    spoiwa
    piasek otaczany
    metoda HOT-BOX
    innovative materials
    innovative foundry technologies
    polymers
    binder
    sand surrounded
    HOT-BOX method
    Opis:
    Rosnąca popularność polimerów biodegradowalnych, możliwości ich wytwarzania, przetwarzania i wykorzystania, stwarzają szansę opracowania nowych materiałów wiążących, do zastosowania w przemyśle odlewniczym. Nowe spoiwa biopolimerowe, spełniające wymagania z zakresu ochrony środowiska, mogą stanowić alternatywę dla dotychczas stosowanych spoiw do mas formierskich i rdzeniowych, w przypadku uzyskania wymaganych właściwości wytrzymałościowych i technologicznych. Prezentowane rozwiązanie, alternatywne do dotychczas opisywanych w literaturze, obejmujące badania mas otrzymywanych z piasków otaczanych spoiwem biodegradowanlym PLA, dotyczy optymalizacji właściwości wytrzymałościowych, w odniesieniu do procentowej zawartości biopolimeru, temperatury i czasu wytwarzania form i rdzeni metodą HOT-BOX. Uzyskane wyniki pozwalają sądzić, że biopolimery mogą być skutecznym zamiennikiem dotychczas stosowanych spoiw mas formierskich i rdzeniowych, a metoda wytwarzania z użyciem piasków otaczanych, może być równie skuteczna jak metody alternatywne.
    Currently moulding sand with biopolymers as a binding agent appears to be probably the most interesting achievement in the mould production from ecology point of view. New biopolymer materials offer the parameters comparable to those which have been in use up to now. Moulding sands with a biopolymer binder were produced. The moulding process of 2% PLA sandmix involving different fusion temperatures and times was studied and the results presented. The results of observations and ultimate tensile strength tests were offered. The obtained results point to the fact that the new sandmix moulding method offered similar results that obtained in the literature. The issue is viewed as requiring further research.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2 spec.; 51-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Design of Cast Technological Equipment for Heat Treatment Furnaces
    Autorzy:
    Drotlew, A.
    Piekarski, B.
    Słowik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/383016.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry materials
    innovative foundry technologies
    heat treatment plant
    heat treatment furnaces
    materiały innowacyjne
    innowacyjne technologie odlewnicze
    piec do obróbki cieplnej
    urządzenia do obróbki cieplnej
    Opis:
    Various examples of the design of cast elements of the equipment used in furnaces for the heat treatment of machine parts are given. Shortcomings in their performance are indicated. Reasons for required stability of equipment are briefly discussed. Elements of equipment illustrate the possibilities of using a charge-carrying pallet with dimensions of 900×600×45 mm as a basis for multi-component technological equipment. Introducing additional elements, such as metal baskets, intermediate pallets or crossbars to the main pallet, it becomes possible to create different configurations of this equipment. The technological equipment presented and discussed here is offered to different plants which heat-treat a wide variety of produced parts. It was found that the reliability and durability of new designed equipment can be checked only during practical use. For large plants dealing with the heat treatment of bulk quantities of parts homogeneous or similar in shape is recommended to use the dedicated tooling.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 31-36
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Modeling to Facilitate Removal of Inclusion Contaminants from the Contact Surface in Transversal Extrusion Processes
    Autorzy:
    Skorulski, G.
    Piwnik, J.
    Hościło, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/379917.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative foundry materials
    extrusion
    aluminium alloys
    experimental modelling
    optimal shape
    inclusion
    contaminants
    innowacyjne technologie odlewnicze
    materiały innowacyjne
    stopy aluminium
    wyciskanie
    modelowanie eksperymentalne
    Opis:
    The paper presents experimental optimization of geometrical conditions regarding the shape of billet’s end pieces in the extrusion process of aluminum alloys. The experiments were performed using appropriately pre-treated plasticine as a substitute material. A special test stand was built using a Plexiglass die in order to make it possible to conduct observations and measurements of the modeled contamination surface. To find the best solution, a great number of shape variants of the billets and of their heating temperatures were experimentally analyzed. An attempt was made to find such a solution that could not only resolve the issue of the removal of contaminants from the contact surface of the pre- heated billets but also develop the least complicated technology of billet fabrication. The test results show how to develop the design process and production technology and also offer advice how to improve the quality of the produced profiles. Finally the authors recommend such a shape for the billets that will ensure effective removal of contaminants from the contact surfaces.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1 spec.; 209-212
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Cooling Rate on Microstructure of Thin-Walled Vermicular Graphite Iron Castings
    Autorzy:
    Górny, M.
    Kawalec, M.
    Sikora, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/380738.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative materials
    vermicular graphite cast iron
    cooling rate
    thermal analysis
    microstructure
    innowacyjne technologie odlewnicze
    materiały innowacyjne
    żeliwo grafitowe wermikularne
    chłodzenie
    analiza termiczna
    mikrostruktura
    Opis:
    This article addresses the effect of cooling rate and of titanium additions on the microstructure of thin-walled vermicular graphite iron (TWCI) castings as determined by changing molding media, section size and Ferro Titanium. The research work was carried out on TWCI castings and reference castings of 2-5 mm and 13-mm wall thickness, respectively. Various molding materials were employed (silica sand and insulating sand ‘‘LDASC’’) to achieve different cooling rates. Thermal analysis was implemented for determinations of the actual cooling rates at the onset of solidification. This study shows that the cooling rates exhibited in the TWCI castings varies widely (70- 14oC/s) when the wall thickness is changed from 2 to 5 mm. In turn, this is accompanied by a significant variation in the vermicular graphite fraction. The resultant cooling rates were effectively reduced by applying an insulating sand in order to obtain the desired vermicular graphite shape. In addition, good agreement was found between the theoretical predictions of the solidification process and the experimental outcome. Ti additions in combination with LDASC sand molds were highly effective in promoting the development of over 80 % vermicular graphite in castings with wall thicknesses of 2 and 3 mm as evidenced by quantitative metallographic analyses.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1 spec.; 139-142
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Implementation of Computer Platform for Foundries Cooperating in a Supply Chain
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Kluska-Nawarecka, S.
    Rojek, G.
    Regulski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/382875.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    application of information technology
    foundry industry
    innovative foundry technologies
    innovative materials
    multi-agent technology
    production support
    zastosowanie technologii informatycznych
    przemysł odlewniczy
    innowacyjne technologie odlewnicze
    materiały innowacyjne
    wsparcie produkcji
    Opis:
    This article presents a practical solution in the form of implementation of agent-based platform for the management of contracts in a network of foundries. The described implementation is a continuation of earlier scientific work in the field of design and theoretical system specification for cooperating companies [1]. The implementation addresses key design assumptions - the system is implemented using multi-agent technology, which offers the possibility of decentralisation and distributed processing of specified contracts and tenders. The implemented system enables the joint management of orders for a network of small and medium-sized metallurgical plants, while providing them with greater competitiveness and the ability to carry out large procurements. The article presents the functional aspects of the system - the user interface and the principle of operation of individual agents that represent businesses seeking potential suppliers or recipients of services and products. Additionally, the system is equipped with a bi-directional agent translating standards based on ontologies, which aims to automate the decision-making process during tender specifications as a response to the request.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 111-116
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Organic Moulding Sands for Production of Large-Size Castings
    Autorzy:
    Major-Gabryś, K.
    Hosadyna-Kondracka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382360.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative materials
    moulding sand
    organic binder
    furfuryl resin
    hardener
    alkyd resin
    alphaset process
    innowacyjne technologie odlewnicze
    materiały innowacyjne
    piasek formierski
    spoiwo organiczne
    żywica furfurylowa
    utwardzacz
    żywica alkidowa
    Opis:
    Recently, some major changes have occurred in the structure of the European foundry industry, such as a rapid development in the production of castings from compacted graphite iron and light alloys at the expense of limiting the production of steel castings. This created a significant gap in the production of heavy steel castings (exceeding the weight of 30 Mg) for the metallurgical, cement and energy industries. The problem is proper moulding technology for such heavy castings, whose solidification and cooling time may take even several days, exposing the moulding material to a long-term thermal and mechanical load. Owing to their technological properties, sands with organic binders (synthetic resins) are the compositions used most often in industrial practice. Their main advantages include high strength, good collapsibility and knocking out properties, as well as easy mechanical reclamation. The main disadvantage of these sands is their harmful effect on the environment, manifesting itself at various stages of the casting process, especially during mould pouring. This is why new solutions are sought for sands based on organic binders to ensure their high technological properties but at the same time less harmfulness for the environment. This paper discusses the possibility of reducing the harmful effect of sands with furfuryl binders owing to the use of resins with reduced content of free furfuryl alcohol and hardeners with reduced sulphur content. The use of alkyd binder as an alternative to furfuryl binder has also been proposed and possible application of phenol-formaldehyde resins was considered.
    Źródło:
    Archives of Foundry Engineering; 2019, 3; 99-105
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Industrial Tests on "Formowax" Pattern Wax Under Investment Foundry Conditions
    Autorzy:
    Kurdziel, P.
    Dydak, A.
    Robak, I.
    Kubosz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/383038.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative materials
    innovative technologies
    investment casting
    pttern waxes
    materiały innowacyjne
    technologie innowacyjne
    inwestycje odlewnicze
    wosk modelowy
    Opis:
    Soft pattern waxes used in investment castings are a mixture of paraffin, stearin and minor amounts of ceresin, polyethylene wax and other natural and synthetic waxes. Nowadays foundries conduct the process of pattern wax formulating on their own. However, instability of the ingredients parameters can have a negative impact on the technological characteristics of the obtained waxes. The paper presents the results of tests on applying a ready-made "FORMOWAX" pattern wax developed by Polwax Sp. z o.o. Application of the reference wax was tested for standard patterns made in Specodlew investment foundry.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2s; 41-44
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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