Ngenisa: Esikhathini lapho izinto zikagesi ziba zincane, zilula, futhi ziguquguquke, isidingo samabhodi esekethe aphrintiwe (PCBs) sesifinyelele amazinga angakaze abonwe. Izimboni ezifana nezezimoto, i-aerospace, kanye nezokwelapha ziya ngokuya zamukela ubuchwepheshe obuhlanganisiwe be-PCB circuit boa...
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