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Tytuł:
Evaluation of Physical Properties of Wax Mixtures Obtained From Recycling of Patterns Used in Precision Casting
Ocena właściwości fizycznych mieszanek woskowych uzyskanych na drodze recyklingu modeli dla odlewnictwa precyzyjnego
Autorzy:
Biernacki, R.
Haratym, R.
Bałkowiec, A.
Wawulska-Marek, P.
Matysiak, H.
Zdunek, J.
Kurzydłowski, K. J.
Powiązania:
https://bibliotekanauki.pl/articles/354030.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
investment casting
wax pattern
wax blends
pattern properties
odlewanie
mieszanki wosku
ocena właściwości
mieszanina modelowa
Opis:
The study investigated the properties of selected certified mixtures used to make wax patterns for the production of precision castings for the aerospace industry. In addition, an assessment of the recycled mixtures consisting of certified wax materials recovered during autoclaving was carried out. Hardness was tested via a proposed method based on penetration, creep related deformation, bending strength and linear contraction. The hardness was studied on laboratory specimens and patterns made with the use of injection molding equipment. For these patterns, linear contraction was estimated at variable pressure and for different temperature injection parameters. Deformations connected with creep and resistance were evaluated on cylindrical specimens. Differences in creep resistance in relation to the hardness were observed depending on the type of pattern mixtures. Recycled mixture has a greater resistance and smaller linear contraction than certified mixtures used for making sprue, raisers and other parts of filler system.
W pracy zbadano właściwości wybranych mieszanek modelowych atestowanych stosowanych do wykonywania modeli wytapianych przy produkcji odlewów precyzyjnych dla przemysłu lotniczego. Dodatkowo badaniom poddano masę z recyklingu składająca się z odzyskanych w procesie autoklawizacji mieszanek woskowych atestowanych. Zaproponowano badania twardości metodą penetracji, odkształceń związanych z pełzaniem, wytrzymałości na zginanie oraz skurczu liniowego. Twardość badano na próbkach laboratoryjnych oraz na modelach wykonanych na wtryskarce przemysłowej. Dla tych modeli oszacowano skurcz liniowy przy zmiennych parametrach ciśnienia i temperatury wytrysku. Odkształcenia związane z pełzaniem i wytrzymałość badano na modelach walcowych. Obserwuje się różnice odporności na pełzanie w odniesieniu do twardości w zależności od rodzaju mieszanki modelowej. Masa z recyklingu ma większą odporność i mniejszy skurcz liniowy niż masa atestowana stosowana na układy wlewowe.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 1; 345-349
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Cobalt Aluminate Content and Pouring Temperature on Macrostructure, Tensile Strength and Creep Rupture of Inconel 713C Castings
Autorzy:
Rakoczy, Ł.
Grudzień, M.
Cygan, R.
Zielińska-Lipiec, A.
Powiązania:
https://bibliotekanauki.pl/articles/356407.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pouring
investment casting
lost wax
superalloy
creep
Opis:
The effect of cobalt aluminate inoculant addition and melt-pouring temperature on the structure and mechanical properties of Ni-based superalloy was studied. The first major move to control the quality of investment cast blades and vanes was the control of grain size. Cobalt aluminate (CoAl2 O4 ) is the most frequently utilized inoculant in the lost-wax casting process of Ni-based superalloys. The inoculant in the prime coat of moulds and pouring temperature play a significant role in grain size control. The finest surface grains were obtained when the internal surface of shell mould was coated with cobalt aluminate and subsequently pouring was at 1480°C. The influence of selected casting parameters and inoculant addition on mechanical properties was investigated on the basis of tensile, creep and hardness testing. The effect of grain refinement on mechanical properties were consistent with established theories. Tests conducted at ambient temperature indicated a beneficial effect of grain refinement both on tensile strength and hardness. In contrast at elevated temperature during creep, the reverse trend was observed.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1537-1545
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Mould Material on the Mechanical Properties of Wax Models
Autorzy:
Kroma, Arkadiusz
Brzęk, P.
Powiązania:
https://bibliotekanauki.pl/articles/2079829.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
FDM
Fused Deposition Modeling
investment casting
wax models
mechanical properties
wax injection dies
odlewanie inwestycyjne
modele woskowe
właściwości mechaniczne
matryce do wtrysku wosku
Opis:
The article presents results of research on the influence of the mould material on selected mechanical properties of wax models used for production of casting in investment casting method. The main goal was to compare the strength and hardness of samples produced in various media in order to analyse the applicability of the 3D printing technology as an alternative method of producing wax injection dies. To make the wax injection dies, it was decided to use a milled steel and 3D printed inserts made using FDM (Fused Deposition Modeling) / FFF (Fused Filament Fabrication) technology from HIPS (High Impact Polystyrene) and ABS (Acrylonitrile Butadiene Styrene). A semi-automatic vertical reciprocating injection moulding machine was used to produce the wax samples made of Freeman Flakes Wax Mixture – Super Pink. During injection moulding process, the mould temperature was measured each time before and after moulding with a pyrometer. Then, the samples were subjected to a static tensile test and a hardness test. It was shown that the mould material influences the strength properties of the wax samples, but not their final hardness.
Źródło:
Archives of Foundry Engineering; 2021, 21, 3; 48-52
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structuring role of F-T synthetic wax in bitumen
Autorzy:
Iwański, M.
Mazurek, G.
Powiązania:
https://bibliotekanauki.pl/articles/202273.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bitumen
synthetic wax F-T
ductility
rheology
morphology
group type
Opis:
The reduction in asphalt mixture production and placement temperatures can be achieved by modifying bitumen 35/50 with the Fischer-Tropsch synthetic wax. To identify the role this modifier plays in the bitumen 35/50, a series of tests has been performed. The experiment was carried out for wax doses from 1.5% to 4.0%. Analysis of the modified binder properties such as ductility at 5, 15 and 25◦C, complex modulus G* with the parameter G*/sinx and LSV, susceptibility according to MSCR procedure, morphology and group type analysis helped describe the structuring function of the F-T wax in the binder. The optimum F-T wax content of 2.5% has been identified to provide the desired parameters required for modified binders.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 525-534
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Casting Technology Experiment and Computer Modeling of Ornaments from Bronze Age
Autorzy:
Garbacz-Klempka, A.
Suchy, J. S.
Kwak, Z.
Długosz, P.
Stolarczyk, T.
Powiązania:
https://bibliotekanauki.pl/articles/353122.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
archeometallurgy
copper alloys
investment casting technology
lost-wax casting
modeling
Opis:
The casting workshop was discovered with numerous artifacts, confirming the existence of the manufacturing process of metal ornaments using ceramic molds and investment casting technology in Lower Silesia (Poland) in 7-6 BC. The research has yielded significant technological information about the bronze casting field, especially the alloys that were used and the artifacts that were made from them. Based on the analyses, the model alloys were experimentally reconstructed. Taking advantage of the computer-modeling method, a geometric visualization of the bronze bracelets was performed; subsequently, we simulated pouring liquid metal in the ceramic molds and observed the alloy solidification. These steps made it possible to better understand the casting processes from the perspective of the mold technology as well as the melting and casting of alloys.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1329-1337
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Investment Casting Technology from Bronze Age. Casting Workshop in Grzybiany (Southwest Poland)
Autorzy:
Garbacz-Klempka, A.
Suchy, J. S.
Kwak, Z.
Tokarski, T.
Klempka, R.
Stolarczyk, T.
Powiązania:
https://bibliotekanauki.pl/articles/352158.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
archeometallurgy
copper alloys
investment casting technology
lost wax casting
x-ray spectroscopy
Opis:
Investment casting technology that utilizes lost-wax casting is one of the most-important achievements of ancient society. In Lower Silesia, Poland (Grzybiany, Legnica county), a 7-6 BC casting workshop was discovered with numerous artifacts, confirming the existence of the manufacturing process of metal ornaments using ceramic molds. The paper presents the research of molds and casts from the Bronze and Early Iron Ages. Microscopic analyses of the casting molds were performed, along with radiographic and chemical composition tests of the artifacts (the latter employing the use of the X-ray fluorescence spectroscopy method). The clustering method was used for alloy classification. The microstructure was analyzed by means of Scanning Electron Microscopy with Energy Dispersive Spectroscopy. Conclusions from the research were utilized in further experiments.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 615-624
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rapid Prototyping of wax foundry models in an incremental process
Szybkie prototypowanie woskowych modeli odlewniczych w procesie przyrostowym
Autorzy:
Kozik, B.
Budzik, G.
Dziubek, T.
Grzelka, M.
Tutak, M.
Powiązania:
https://bibliotekanauki.pl/articles/380752.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rapid prototyping
wax models
model 3D-CAD
prototypowanie szybkie
model woskowy
Opis:
The paper presents an analysis incremental methods of creating wax founding models. There are two methods of Rapid Prototyping of wax models in an incremental process which are more and more often used in industrial practice and in scientific research. Applying Rapid Prototyping methods in the process of making casts allows for acceleration of work on preparing prototypes. It is especially important in case of element having complicated shapes. The time of making a wax model depending on the size and the applied RP method may vary from several to a few dozen hours.
Artykuł przedstawia analizę przyrostowych metod wytwarzania woskowych modeli odlewniczych. W praktyce przemysłowej i badaniach naukowych stosuje się coraz częściej metody szybkiego prototypowania modeli woskowych w procesie przyrostowym. Zastosowanie metod RP w procesie wytwarzania odlewów pozwala na przyspieszenie prac nad przygotowaniem prototypów. Jest to szczególnie ważne w przypadku elementów o skomplikowanych kształtach. Czas wykonania modelu woskowego w zależności od gabarytów i zastosowanej metody Rapid Prototyping może wynieść od kilku do kilkudziesięciu godzin.
Źródło:
Archives of Foundry Engineering; 2011, 11, 2 spec.; 113-116
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of analysis method on evaluation of ceramic mould surface microgeometry in the lost wax process
Autorzy:
Matysiak, H.
Haratym, R.
Kwapisz, J.
Kłębczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/379613.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
surface microgeometry
ceramic mould
lost wax process
mikrogeometria powierzchni
forma ceramiczna
metoda traconego wosku
Opis:
In this article two methods of ceramic mould surface microgeometry analysis were presented. First was a contact method, in which Profilometer S3P produced by Perthen Mahr was used. In second optical method optical profiler Veeco NT 9300 was used for surface microgeometry analysis. Evaluation of the results gathered with those methods was made. It was found that optical analysis method of surface microgeometry give better research possibilities (it’s more optimal).
Źródło:
Archives of Foundry Engineering; 2011, 11, 3 spec.; 131-134
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the solidification and properties of plaster cast Al based composites
Analiza krzepnięcia i właściwości odlewanych kompozytów na bazie aluminium
Autorzy:
Egizabal, P.
García Romero, A.
Torregaray, A.
Powiązania:
https://bibliotekanauki.pl/articles/354555.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
F3S.20S
MMCs
odlewy gipsowe
krzepnięcie
lost wax
plaster casting
solidification
Opis:
The present work deals with aspects related to the solidification and properties of an Al-Si10Mg/SiC20p alloy cast in plaster moulds. Several strategies were followed to shorten its solidification time such as embedding copper tubes into the mould to make circulate cooling fluids immediately after the casting step. The analysis of cooling curves provided valuable information on the effect of the particles on solidification events. The precipitation of different phases of the MMC takes place at higher temperatures and earlier than in the case of the non reinforced alloy. Particles affect the solidification pattern of the alloy and play a noticeable role in the precipitation of the phases. This fact should be taken into account to design the filling and feeding systems correctly and for modelling and processing parameters as well as in thermal treatments. Eventually samples were obtained under the highest solidification rate conditions to analyse the microstructure and tensile properties of the MMC material.
Praca przedstawia aspekty związane z krzepnięciem i właściwościami stopów Al-Si10Mg/SiC20p odlewanych w formach gipsowych. Aby skrócić czas krzepnięcia stopu testowano kilka strategii, takich jak osadzanie rur miedzianych w formie aby umożliwić obieg cieczy chłodzących natychmiast po odlaniu stopu. Analiza krzywych chłodzenia dostarczyłacennych informacji na temat wpływu cząstek na proces krzepnięcia. Wydzielanie różnych faz w kompozytach metalowo-ceramicznych odbywa się w wyższych temperaturach i wcześniej, niż w przypadku nieumacnianego stopu. Cząstki wpływają na schemat krzepnięcia stopu i odgrywają zauważalną rolę w wydzielaniu faz. Fakt ten powinien być brany pod uwagę przy projektowaniu prawidłowego systemu zalewania formy, modelowaniu parametrów procesu, jak również obróbki cieplnej. Na koniec pobrano próbki otrzymane przy najwyższej szybkości krzepnięcia do analizy mikrostruktury i właściwości wytrzymałościowych kompozytu metalowo-ceramicznego.
Źródło:
Archives of Metallurgy and Materials; 2012, 57, 1; 119-125
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A correlation by chemometric methods of Solanum tuberosum epicuticular wax components and plant infestation with Leptinotarsa decemlineata [Say]
Autorzy:
Szafranek, B.
Synak, E.
Nawrot, J.
Malinski, E.
Szafranek, J.
Powiązania:
https://bibliotekanauki.pl/articles/65492.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
epicuticular wax
chemometric method
pest
Solanum tuberosum
Leptinotarsa decemlineata
Colorado potato beetle
plant infestation
Źródło:
Journal of Plant Protection Research; 2002, 42, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of epicuticular waxes from triticale on the feeding behaviour and mortality of the grain aphid, Sitobion avenae (Fabricius) (Hemiptera: Aphididae)
Autorzy:
Wojcicka, A.
Powiązania:
https://bibliotekanauki.pl/articles/66422.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
epicuticular wax
triticale
winter triticale
feeding behaviour
mortality
grain aphid
Sitobion avenae
Hemiptera
Aphididae
Opis:
Surface waxes from wax-covered triticale plants (RAH 122) were sprayed on plants of the waxless genotype RAH 366 or the surface waxes were used to make artificial diet preparations. The results were significant increases in the mortality of apterous adults of the grain aphid Sitobion avenae (Fabricius) (Hemiptera: Aphididae) at all concentrations tested in comparison with those aphids which fed on the control plants or aphids which were reared on the diets. In the choice tests, most aphids settled on plants without surface waxes or on diet preparations which did not have surface waxes (the controls). When the concentration of the surface waxes was increased on one of the plants or surface waxes were increased in the diet preparation, the number of wandering aphids increased. Those aphids which did not wander were mainly on the waxless control plants or on the waxless diet preparations. Aphids did settle on those plants or on the diet preparations which had 100 and 1,000 μg · g–1 of surface wax. The aphids rarely settled on the diet preparations containing 10,000 μg ∙ g–1 of surface waxes. From these observations it appears that surface waxes can act as a feeding deterrent. Since aphids on plants with surface waxes, or aphids which settled on diet preparations with surface waxes, started to die earlier than aphids fed only the control plants or the control diet preparations, it is possible that the surface waxes had a toxic effect that led to early mortality. Thus, it can be said that the surface waxes caused feeding deterrence and had a toxic effect on the aphids.
Źródło:
Journal of Plant Protection Research; 2016, 56, 1
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature moderation in a multistorey building by melting of a phase-change material
Autorzy:
Dubovsky, V.
Ziskind, G.
Letan, R.
Powiązania:
https://bibliotekanauki.pl/articles/240188.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wax melting
room cooling at ceiling
numerical simulations
thermal comfort
topienie
wosk
chłodzenie
symulacja numeryczna
komfort cieplny
Opis:
The current numerical study focuses on the feasibility of furnishing thermal comfort in a structure, by using paraffin wax stored on a plate below the ceiling in a multi-storey building. The method is aimed to reduce energy demands at the increasing thermal loads. In summer, in daytime, walls of the building are exposed to the ambient thermal load, and heat transferred inside is absorbed by the melting wax. The study is numerical. It relates to temperature variations outside and inside, coupled with heat conduction and accumulation in walls, with radiation between the surfaces, with natural convection of air inside and melting of the wax at the ceiling. Fins spacing on the storage plate, visualization of the melting process, and its parametric investigation provide an insight into the physical phenomena. Temperature and flow fields were investigated for 3 mm and 12 mm thick layers of wax. At the specified conditions of the present study a 3 mm layer provides thermal comfort for most of the day, while a 6 mm layer may suffice for the entire day. Fluent 6.3 software was used in the computations.
Źródło:
Archives of Thermodynamics; 2013, 34, 1; 85-101
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation criteria of wax pattern strength tests and their role in forecasting the shape accuracy of wax patterns
Autorzy:
Haratym, R.
Biernacki, R.
Lewiński, J.
Kwapisz, J.
Powiązania:
https://bibliotekanauki.pl/articles/381367.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pattern strength
lost wax casting
pattern test
sustainability
recycling
wzór wytrzymałościowy
metoda traconego wosku
test wytrzymałościowy
recykling
Opis:
This research paper will present and analyze selected testing of wax patterns - bending strength test, test of resistance to creep and penetration hardness test. Evaluation of these tests will be carried out in terms of the shape accuracy of wax patterns. Additionally, statistical evaluation will be carried out of relationships between selected parameters of previously mentioned tests. Standard bending tests will be statistically evaluated and compared with two other test methods conducted on corresponding patterns. Particular attention will be given to creep resistance, which is a very useful test method for assessing changes in the shape of complex patterns in the function of time and temperature. At the same time an evaluation of hardness tests of wax patterns will be carried out with usage of appropriate samples or by direct examination of the production patterns.
Źródło:
Archives of Foundry Engineering; 2013, 13, 4; 49-52
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of selected properties of asphalt concrete with synthetic wax
Autorzy:
Mazurek, G.
Iwański, M.
Powiązania:
https://bibliotekanauki.pl/articles/202091.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
initial yield strength
synthetic wax
Prony Series
pseudo-strain
viscoplastic deformation
granica plastyczności
wosk syntetyczny
szereg Prony
Opis:
This article discusses the issue of viscoplastic deformation that usually occurs in road pavements, especially in the summer season in Poland. The evaluation of viscoplastic deformations was performed on the example of the asphalt concrete designated for the binding course layer (AC16W). Additionally, the bitumen used for manufacturing asphalt concrete samples was modified with two types of synthetic waxes widely applied in the warm mix asphalt technology. These waxes varied in molecular weight, which affected their softening point results. Before decomposition of the total strain into elastic and viscoplastic part, oscillatory tests in the linear viscoelastic region were required. The generalized Maxwell model was used to describe the behavior of asphalt concrete in the linear viscoelastic range. Using the elasto-viscoelastic correspondence principle, described by Schapery, the initial yield strength stress was evaluated. The pseudostrain variable turned out to be useful for estimating the onset of viscoplastic strains occurring in road pavement. Such engineering procedure approach could result in faster approximation of the yield strength level during the design of pavement structures. It will also allow for differentiation of mixtures in terms of their susceptibility to permanent deformation and of their sensitivity to traffic induced overloading.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 2; 217-228
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Remelting on the Quality of Prosthetic Cobalt Alloys
Autorzy:
Nadolski, M.
Łągiewka, M.
Konopka, Z.
Zyska, A.
Golański, G.
Powiązania:
https://bibliotekanauki.pl/articles/382647.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cobalt alloy
centrifugal casting
lost wax technology
dental prosthetics
stop kobaltu
odlewanie odśrodkowe
metoda wytapianych modeli
protetyka stomatologiczna
Opis:
A commercial cobalt alloy applied in dental prosthetics was investigated. The scope of the work included the microstructure analysis, performance examination (tensile strength, microhardness, corrosion resistance), and dilatometric examination. The investigated alloy after a single remelting was characterised by higher tensile strength and hardness. There were not found the definite results with regard to the corrosion resistance of the examined materials. No significant change occurred in the coefficient of thermal expansion.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3 spec.; 53-58
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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