Ngophuhliso olukhawulezayo lweshishini le-PCB, i-PCB ihamba ngokuthe ngcembe ukuya kwicala lemigca echanekileyo ephezulu, imingxuma emincinci, kunye nemilinganiselo ephezulu (6: 1-10: 1).Iimfuno zobhedu lomngxuma ziyi-20-25Um, kwaye isithuba somgca we-DF singaphantsi kwe-4mil.Ngokubanzi, iinkampani zokuvelisa iPCB ...
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