Cov txheej txheem nqus tsev vacuum feem ntau suav nrog cov kauj ruam xws li kev ntxuav qhov chaw ntawm lub substrate, kev npaj ua ntej txheej, kev tso pa tawm, khaws cov khoom, kev kho tom qab plating, kev sim, thiab cov khoom tiav. (1) Kev ntxuav qhov chaw ntawm lub substrate. Phab ntsa chav nqus tsev, lub thav duab substrate thiab lwm yam ...
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