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Tytuł:
The Evaluation of Mechanical Properties of High-tin Bronzes
Autorzy:
Nadolski, M.
Powiązania:
https://bibliotekanauki.pl/articles/381333.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
właściwości mechaniczne
brąz cynowy
dzwon
mikrostruktura
mechanical properties
tin bronzes
bell material
microstructure
Opis:
High-tin bronzes are used for church bells and concert bells (carillons). Therefore beside their decorative value, they should also offer other functional properties, including their permanence and good quality of sound. The latter is highly influenced by the structure of bell material, i.e. mostly by the presence of internal porosity which interferes with vibration of the bell waist and rim, and therefore should be eliminated. The presented investigations concerning the influence of tin content ranging from 20 to 24 wt% on mechanical properties of high-tin bronzes allowed to prove the increase in hardness of these alloys with simultaneous decrease in the tensile and the impact strengths (Rm and KV, respectively) for the increased tin content. Fractures of examined specimens, their porosity and microstructures were also assessed in order to explain the observed regularities. A reason of the change in the values of mechanical properties was revealed to be the change in the shape of α-phase crystals from dendritic to acicular one, and generation of grain structure related to the increased Sn content in the alloy.
Źródło:
Archives of Foundry Engineering; 2017, 17, 1; 127-130
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Iron in AlSi10MgMn Alloy
Autorzy:
Žihalová, M.
Bolibruchová, D.
Powiązania:
https://bibliotekanauki.pl/articles/382235.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
alloy AlSi10MgMn
intermetallic phase
bronze
stop AlSi10MgMn
faza międzymetaliczna
brąz
Opis:
Presence of iron in Al-Si cast alloys is common problem mainly in secondary (recycled) aluminium alloys. Better understanding of iron influence in this kind of alloys can lead to reduction of final castings cost. Presented article deals with examination of detrimental iron effect in AlSi10MgMn cast alloy. Microstructural analysis and ultimate tensile strength testing were used to consider influence of iron to microstructure and mechanical properties of selected alloy.
Źródło:
Archives of Foundry Engineering; 2014, 14, 4; 109-112
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Solidification Rate on High-tin Bronze Microstructure
Autorzy:
Bartocha, D.
Baron, C.
Suchoń, J.
Powiązania:
https://bibliotekanauki.pl/articles/380563.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high-tin bronze
solidification rate
microstructure
bell’s tone
brąz wysokocynowy
szybkość krzepnięcia
mikrostruktura
dzwon
Opis:
The most important feature of bells is their sound. Their clarity and beauty depend, first of all, on the bell’s geometry - particularly the shape of its profile and the mechanical properties of alloy. Bells are the castings that work by emitting sound in as-cast state. Therefore all features that are created during melting, pouring, solidification and cooling processes will influence the bell's sound. The mechanical properties of bronze depend on the quality of alloy and microstructure which is created during solidification and depend on its kinetics. Hence, if the solidification parameters influence the alloy’s properties, how could they influence the frequencies of bell`s tone? Taking into account alterable thickness of bell's wall and differences in microstructure, the alloy's properties in bell could be important. In the article authors present the investigations conducted to determine the influence of cooling kinetics on microstructure of bronze with 20 weight % tin contents.
Źródło:
Archives of Foundry Engineering; 2019, 1; 89-97
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer Advisory System in the Domain of Cooper Alloys Manufacturing
Autorzy:
Wilk-Kołodziejczyk, D.
Kluska-Nawarecka, S.
Rojek, G.
Regulski, K.
Powiązania:
https://bibliotekanauki.pl/articles/383285.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
copper alloy
bronze
modification
quenching
tempering
cased based reasoning
stop miedzi
brąz
modyfikacja
hartowanie
odpuszczanie
Opis:
The main scope of the article is the development of a computer system, which should give advices at problem of cooper alloys manufacturing. This problem relates with choosing of an appropriate type of bronze (e.g. the BA 1044 bronze) with possible modification (e.g. calcium carbide modifications: Ca + C or CaC2) and possible heat treatment operations (quenching, tempering) in order to obtain desired mechanical properties of manufactured material described by tensile strength - Rm, yield strength - Rp0.2 and elongation - A5. By construction of the computer system being the goal of presented here work Case-based Reasoning is proposed to be used. Case-based Reasoning is the methodology within Artificial Intelligence techniques, which enables solving new problems basing on experiences that are solutions obtained in the past. Case-based Reasoning also enables incremental learning, because every new experience is retained each time in order to be available for future processes of problem solving. Proposed by the developed system solution can be used by a technologist as a rough solution for cooper alloys manufacturing problem, which requires further tests in order to confirm it correctness.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3; 77-80
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mediaeval Casts of the Eastern Reliquary Crosses
Autorzy:
Garbacz-Klempka, A.
Nosek, E. M.
Rzadkosz, S.
Powiązania:
https://bibliotekanauki.pl/articles/381176.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nondestructive testing method
artistic casting
metal artefacts conservation
copper alloy
bronze
badanie nieniszczące
odlewnictwo artystyczne
konserwacja metalu
stop miedzi
brąz
Opis:
Non-destructive testing methods are widely applied for metal artefacts research. The analyses presented here are part of research and conservation program encompassing metal artefacts discovered during archaeological excavations in the years 2010–2011 in the area of Czermno. Among metal artefacts of archaeological origin there is an important group of objects connected with cult. Reliquary crosses called encolpions can be distinguished here; worn both by priests and by lay people in Central and Eastern Europe. They present an interesting group for historical and iconographic research, as well as for the analyses of the materials and the techniques applied. The type of cast encolpions were examined, found in the area of the old dwelling complex connected with fortified settlement of Czermno (the old Grody Czerwieńskie). These objects are initially dated to the 12th century. These metal artefacts are researched, by application of the non-destructive testing methods, at the Faculty of Foundry Engineering of the AGH University of Science and Technology in Kraków in cooperation with Maria Curie-Skłodowska University in Lublin, the Polish Academy of Sciences and the Rzeszów University. The research helped to enlarge the scientific scope of knowledge on Mediaeval materials and manufacturing techniques, while the conservation efforts gave back the proper artistic value to the artefacts from Czermno and allowed for the appropriate exhibition.
Źródło:
Archives of Foundry Engineering; 2013, 13, 1 spec.; 147-152
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Tin Bronze Melting and Pouring Parameters on Its Properties and Bells’ Tone
Autorzy:
Bartocha, D.
Baron, C.
Powiązania:
https://bibliotekanauki.pl/articles/382015.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tin bronze
melting parameters
pouring parameters
bell’s tone
brąz cynowy
parametry wytapiania
parametry zalewania
ton dzwonu
Opis:
The most important feature of bells is their sound. Its clarity and beauty depend, first of all, on the bell’s geometry - particularly the shape of its profile, but also on the quality of alloy used to its cast. Hence, if the melting and pouring parameters could influence the alloy’s properties, what influence they would have on the frequencies of bell’s tone. In the article authors present their own approaches to find answers on that and more questions.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 17-22
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation and Microstructure Evolution of Continuous Unidirectional Solidification Tin Bronze Alloy at Different Continuous Casting Speed
Autorzy:
Luo, Jihui
Powiązania:
https://bibliotekanauki.pl/articles/946869.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
unidirectional solidification
Tin bronze
microstructure evolution
continuous casting
casting speed
krzepnięcie jednokierunkowe
brąz cynowy
mikrostruktura
odlewanie ciągłe
prędkość odlewania
Opis:
The mold temperature of the downward continuous unidirectional solidification (CUS) cannot be controlled higher than the liquidus of alloys to be cast. Therefore, the continuous casting speed becomes the main parameter for controlling the growth of columnar crystal structure of the alloy. In this paper, the tin bronze alloy was prepared by the downward CUS process. The microstructure evolution of the CUS tin bronze alloy at different continuous casting speeds was analysed. In order to further explain the columnar crystal evolution, a relation between the growth rate of columnar crystal and the continuous casting speed during the CUS process was built. The results show that the CUS tin bronze alloy mainly consists of columnar crystals and equiaxed crystals when the casting speed is low. As the continuous casting speed increases, the equiaxed crystals begin to disappear. The diameter of the columnar crystal increases with the continuous casting speed increasing and the number of columnar crystal decreases. The growth rate of columnar crystal increases with increasing of the continuous casting speed during CUS tin bronze alloy process.
Źródło:
Archives of Foundry Engineering; 2020, 20, 2; 118-122
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tribological Characterization of Al-bronzes Used as Mold Materials
Autorzy:
Atapek, Ş. H.
Aktaş Çelik, G.
Polat, Ş.
Pisarek, B.
Powiązania:
https://bibliotekanauki.pl/articles/383212.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wear resistant
aluminium bronze
mechanical properties
tribological properties
tribocorrosion resistance
zużycie ścierne
brąz aluminiowy
właściwości mechaniczne
właściwości trybologiczne
odporność tribokorozyjna
Opis:
Among the copper based alloys, Cu-Al-X bronzes are commonly used as mold materials due to their superior physical and chemical properties. Mold materials suffer from both wear and corrosion, thus, it is necessary to know which one of the competitive phenomenon is dominant during the service conditions. In this study, tribo-corrosion behavior of CuAl10Ni5Fe4 and CuAl14Fe4Mn2Co alloys were studied and electrochemical measurements were carried out using three electrode system in 3.5 % NaCl solution in order to evaluate their corrosion resistance. In tribo-corrosion tests, alloys were tested against zirconia ball in 3.5 % NaCl solution, under 10N load with 0.04 m/s sliding speed during 300 and 600 m. The results indicate that (i) CuAl10Ni5Fe4 alloy is more resistant to NaCl solution compared to CuAl14Fe4Mn2Co alloy that has major galvanic cells within its matrix, (ii) although CuAl10Ni5Fe4 alloy has lower coefficient of friction value, it suffers from wear under dry sliding conditions, (iii) as the sliding distance increases, corrosion products on CuAl14Fe4Mn2Co surface increase at a higher rate compared to CuAl10Ni5Fe4 leading to a decrease in volume loss due to the lubricant effect of copper oxides.
Źródło:
Archives of Foundry Engineering; 2017, 17, 4; 7-12
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of Stress Distribution in a Thick- Walled Bushing Produced by Die-Casting
Autorzy:
Pisarek, B. P.
Kołakowski, D.
Pacyniak, T.
Powiązania:
https://bibliotekanauki.pl/articles/381088.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mechanical properties
metallography
computer simulation
residual stress
complex aluminium bronze
właściwości mechaniczne
metalografia
symulacja komputerowa
naprężenia własne
brąz aluminiowy
Opis:
Metallographic investigations and a computer simulation of stresses in a gravity die-casting bushing were performed. Simulation of the casting process, solidification of the thick-walled bushing and calculations of the stress was performed using MAGMA5.3 software. The size variability of phases κII affecting the formation of phase stresses σf, depending on the location of the metallographic test area, was identified. The distribution of thermal σt and shrinkage stresses σs, depending on the location of the control point SC in the bushing's volume, was estimated. Probably the nature of these stresses will change slightly even after machining. This can cause variations in operating characteristics (friction coefficient, wear). Due to the strong inhomogeneity of the stress distribution in the bushing's casting, it is necessary to perform further tests of the possibility to conduct thermal treatment guaranteeing homogenization of the internal stresses in the casting, as well as to introduce changes in the bushing's construction and the casting technology. The paper presents the continuation of the results of research aimed at identifying the causes of defects in the thick-walled bushing, die-casting made of CuAl10Fe5Ni5Cr aluminium bronze.
Źródło:
Archives of Foundry Engineering; 2017, 17, 4; 127-132
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
„Sekret” tradycyjnej technologii odlewania dzwonów
„The Secret” of Traditional Technology of Casting Bells
Autorzy:
Bartocha, D.
Baron, C.
Powiązania:
https://bibliotekanauki.pl/articles/382233.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
technologia odlewania
odlewanie dzwonów
brąz CuSn20-C
masa formierska
masa gliniana
masa ludwisarska
casting bells technology
CuSn20-C brass
mould sand
Opis:
Artykuł poświęcono zagadnieniu technologiczności tradycyjnego sposobu odlewania dzwonów. Pomimo złamania podstawowych zasad poprawnego projektowania technologii odlewania, tradycyjna technologia wykonywania dzwonów sprawdza się od setek lat. Autorzy analizując wyniki badań brązu CuSn20-C oraz tradycyjnej masy formierskiej używanej do wykonywania form na dzwony, próbują wykazać na czym polega tajemnica fenomenu najstarszej z aktualnie stosowanych technologii odlewania.
The article are devoted to the issue of manufacturability of the traditional way of casting bells. Despite breaking the fundamental principles of proper casting technology design, traditional technology of casting bells has works for hundreds of years. The authors have analyzing the investigations results of a bronze CuSn20-C and traditional molding sand is used to produce molds for bells and they have been trying to demonstrate what is the secret of the marvel of the oldest currently used casting technology.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3 spec.; 5-10
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Post Cast Heat Treatment on Cu20wt.%Sn on Microstructure and Mechanical Properties
Autorzy:
Slamet, S.
Suyitno, S.
Indraswari Kusumaningtyas, I. K.
Powiązania:
https://bibliotekanauki.pl/articles/2079820.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tin bronze
sand casting
heat treatment
microstructure
mechanical properties
brąz cynowy
odlewanie piaskowe
obróbka cieplna
mikrostruktura
właściwości mechaniczne
Opis:
Casting is one method of making metal components that are widely used in industry and up to date. The sand casting method is used due to its simplicity, ease of operation, and low cost. In addition, the casting method can produce cast products in various sizes and is well-suited for mass production. However, the disadvantage of casting, especially gravity casting, is that it has poor physical and mechanical properties. Tin bronze Cu20%wt.Sn is melted in a furnace, then poured at a temperature of 1100°C into a sand mold. The cast product is a rod with 400 mm in length, 10 mm in thickness, and 10 mm in width. The heat treatment mechanism is carried out by reheating the cast specimen at a temperature of 650°C, holding it for 4 hours, and then rapid cooling. The specimens were observed microstructure, density, and mechanical properties include tensile strength and bending strength. The results showed that there was a phase change from α + δ to α + β phase, an increase in density as a result of a decrease in porosity and a coarse grain to a fine grain. In addition, the tensile strength and bending strength of the Cu20wt.%Sn alloy were increased and resulted in a more ductile alloy through post-cast heat treatment.
Źródło:
Archives of Foundry Engineering; 2021, 21, 4; 87-92
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model of Cu-Al-Fe-Ni bronze crystallization
Autorzy:
Pisarek, B. P.
Powiązania:
https://bibliotekanauki.pl/articles/383278.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
theoretical basis
foundry proces
thermal analysis
derivative analysis
microstructure
Cu-Al-Fe-Ni bronze
model of crystallization
podstawy teoretyczne
proces odlewniczy
analiza termiczna
analiza derywacyjna
mikrostruktura
brąz Cu-Al-Fe-Ni
model krystalizacji
Opis:
According to the analysis of the current state of the knowledge shows that there is little information on the process of phase transformations that occur during the cooling Cu-Al-Fe-Ni hypo-eutectoid bronzes with additions of Cr, Mo and/or W, made additions individually or together, for the determination of: the type of crystallizing phases, crystallizing phases, order and place of their nucleation. On the basis of recorded using thermal and derivative analysis of thermal effects phases crystallization or their systems, analysis of the microstructure formed during crystallization - observed on the metallographic specimen casting ATD10-PŁ probe, analysis of the existing phase equilibrium diagrams forming elements tested Cu-Al-Fe-Ni bronze, with additions of Cr, Mo, W and/or Si developed an original model of crystallization and phase transformation in the solid state, the casting of high quality Cu-Al-Fe-Ni bronze comprising: crystallizing type phase, crystallizing phase sequence, place of nucleation.
Źródło:
Archives of Foundry Engineering; 2013, 13, 3; 72-79
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of toughening combined with microjet cooling during quenching (solution heat treatment) of calcium carbide-modified CuAl10Fe4Ni4 alloy on its mechanical properties
Autorzy:
Górny, Z.
Kluska-Nawarecka, S.
Saja, K.
Powiązania:
https://bibliotekanauki.pl/articles/382512.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cast aluminum bronzes
heat treatment
odlew aluminiowy
brąz aluminiowy
obróbka cieplna
Opis:
The work presents the results of the experimental research concerning the impact of a heat treatment (toughening) of aluminum bronze CuAl10Fe4Ni4 on its mechanical properties. The conditions of the experiments and selected results are described. A detailed description of the effects of individual heat treatment conditions namely low and high temperature aging is also presented in the work.
Źródło:
Archives of Foundry Engineering; 2013, 13, 1; 29-32
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Impact of Nickel Additions on Tin Bronzes
Autorzy:
Kozana, J.
Garbacz-Klempka, A.
Piękoś, M.
Czekaj, J.
Perek-Nowak, M.
Powiązania:
https://bibliotekanauki.pl/articles/382525.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wear resistant alloys
tin bronze
microstructure
alloy additives
Cu–Sn–Ni alloy
stopy odporne na zużycie
brąz cynowy
mikrostruktura
dodatki stopowe
stop Cu-Sn-Ni
Opis:
High prices of tin and its limited resources, as well as several valuable properties characterising Cu-Sn alloys, cause searching for materials of similar or better properties at lower production costs. The influence of various nickel additions to CuSn10 casting bronze and to CuSn8 bronze of a decreased tin content was tested. Investigations comprised melting processes and casting of tin bronzes containing various nickel additions (up to 5%). The applied variable conditions of solidification and cooling of castings (metal and ceramic moulds) allowed to assess these alloys sensitivity in forming macro and microstructures. In order to determine the direction of changes in the analysed Cu-Sn-Ni alloys, the metallographic and strength tests were performed. In addition, the solidification character was analysed on the basis of the thermal analysis tests. The obtained results indicated the influence of nickel in the solidification and cooling ways of the analysed alloys (significantly increased temperatures of the solidification beginning along with increased nickel fractions in Cu-Sn alloys) as well as in the microstructure pattern (clearly visible grain size changes). The hardness and tensile strength values were also changed. It was found, that decreasing of the tin content in the analysed bronzes to which approximately 3% of nickel was added, was possible, while maintaining the same ultimate tensile strength (UTS) and hardness (HB) and improved plasticity (A5).
Źródło:
Archives of Foundry Engineering; 2018, 18, 1; 53-60
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Causes of Cracks in a Thick-Walled Bush Made of Die-Cast Aluminum Bronze
Autorzy:
Pisarek, B. P.
Kołakowski, D.
Pacyniak, T.
Powiązania:
https://bibliotekanauki.pl/articles/381784.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information technology
foundry industry
MAGMA5
die casting
complex aluminium bronze
hot tear
cold crack
technologia informatyczna
przemysł odlewniczy
odlewnictwo ciśnieniowe
brąz aluminiowy
pęknięcie zimne
Opis:
For the die casting conditions of aluminium bronzes assumed based on the literature data, a thick-walled bush was cast, made of complex aluminium bronze (Cu-Al-Fe-Ni-Cr). After the cast was removed from the mould, cracks were observed inside it. In order to identify the stage in the technological production process at which, potentially, the formation of stresses damaging the continuity of the microstructure created in the cast was possible (hot cracking and/or cold cracking), a computer simulation was performed. The article presents the results of the computer simulation of the process of casting the material into the gravity die as well as solidifying and cooling of the cast in the shape of a thick-walled bush. The simulation was performed with the use of the MAGMA5 program and by application of the CuAl10Ni5,5Fe4,5 alloy from the MAGMA5 program database. The results were compared with the location of the defects identified in the actual cast. As a result of the simulation of the die-casting process of this bush, potential regions were identified where significant principal stresses accumulate, which can cause local hot and cold cracking. Until now, no research has been made of die-cast aluminium bronzes with a Cr addition. Correlating the results of the computer simulation validated by the analysis of the actual cast made it possible to clearly determine the critical regions in the cast exposed to cracking and point to the causes of its occurrence. Proposals of changes in the bush die casting process were elaborated, in order to avoid hot tearing and cold cracking. The article discusses the results of preliminary tests being a prologue to the optimization of the die-casting process parameters of complex aluminium bronze thick-walled bushs.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 119-124
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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