Pogwiritsa ntchito chitoliro chonse cha PVC (polyvinyl chloride) pomanga, ulimi, makampani opanga mankhwala ndi madera ena, kufunikira kwa zida zopangira chitoliro cha PVC kukukulirakulira. Posachedwapa, mtundu watsopano wa zida wotchedwa Intaneti PVC chitoliro kudula makina anabadwa, amene ...
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