Dexing khitchini ndi bafa anayamba mankhwala atsopano, mankhwala ndi mtundu lakuya, wapangidwa pamwamba pa zitsulo zosapanga dzimbiri lakuya ndi vacuum electroplating, kupanga mitundu yosiyanasiyana, akhoza kukhala golide lakuya, lakuda lakuya, imvi lakuya ndi mitundu ina yosiyana, ndi PVD imamira mu zokutira nano, akhoza ...
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