Iivalvu ze-Bellows ezitywiniweyo zeGlobe: Isisombululo esithembekileyo kwiiMfuno zakho zeMibhobho Iinkqubo zemibhobho zisetyenziswa kumashishini ahlukeneyo aquka i-oyile negesi, imichiza kunye nepetrochemical, ukukhankanya ezimbalwa.Ukuqinisekisa ukuhamba kakuhle nangokufanelekileyo kolwelo olugqithiswa ngale mibhobho, iivalvu ezikumgangatho ophezulu r...
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