4J42 isimbi-nickel fixed expansion alloy, inonyanya kuumbwa nesimbi (Fe) uye nickel (Ni), ine nickel iri pakati pe41% kusvika 42%. Pamusoro pezvo, inewo zvinhu zvishoma zvakaita sesilicon (Si), manganese (Mn), kabhoni (C), uye phosphorus (P). Iyi chemica compositi...
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