Koj puas paub cov ntsiab lus koj yuav tsum paub thaum siv PCB fais fab mov?
Koj puas paub cov ntsiab lus koj yuav tsum paub thaum siv PCB fais fab mov? Cov khoom siv hluav taws xob PCB, tseem hu ua cov khoom siv hluav taws xob qhib, yog cov kev sib cog lus, cov nqi tsim nyog tau siv dav hauv kev lag luam, kev sib txuas lus, thiab cov kab ke. Tsis zoo li lub zog hluav taws xob sup ...
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