Idiphu eshushu yokuntywila ikwidiphu eshushu yediphu ye-zinc, isantya semveliso, ukutyabeka okushinyeneyo kodwa okungalinganiyo, imarike ivumela ukutyeba okuphantsi kweemicrons ezingama-45, ukuya kutsho kuma-300 eemicrons ngaphezulu.Imnyama ngombala, itya intsimbi ye-zinc ngakumbi, yenza umaleko wokungenwa ngesiseko sesinyithi, kwaye inomhlwa elungileyo...
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