Mapaipi a PVC (polyvinyl chloride) amagwiritsidwa ntchito kwambiri pazinthu zosiyanasiyana, kuphatikiza zomangamanga, mapaipi, ndi ulimi wothirira. Zotsatira zake, kufunikira kwa makina opanga chitoliro cha PVC kwakula kwambiri. Komabe, ndi makina ambiri a PVC chitoliro omwe alipo, kusankha yoyenera yochokera ...