Cov khoom dab tsi yog ua los ntawm hmoov metallurgy?
Cov hmoov hlau metallurgy cov khoom siv hauv tsev, cov cuab yeej hluav taws xob thiab tshuab xaws yog ntau heev. Yog tias cov khoom siv metallurgy tuaj yeem nrov hauv cov tub yees, tshuab ntxhua khaub ncaws kiv cua, thiab tshuab xaws, cov cuab yeej thiab kev lag luam ...
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