Igumbi loVavanyo lokuguga-Vavanya ifuthe lobushushu, ukukhanya kwelanga, ukukhanya kwe-UV, ukufuma, ukubola kunye nezinye izinto ekwaluphaleni kwezinto, izixhobo kunye nezithuthi yi-SGS.Izithuthi kunye namacandelo azo kunye nezixhobo zifumana uluhlu lweziganeko zemozulu kubomi babo bonke, uninzi lwazo olunokuthi...
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