Onetsetsani kunena zitatu, ziyenera kukhala: PPR, PVC, PE 1. Mapaipi apulasitiki omwe amagwiritsidwa ntchito kawirikawiri ndi: PPR (polypropylene), PVC (polyvinyl chloride), PB (polybutene), PE-RT (polyethylene yosagwira kutentha), PE (polyethylene) \HDPE (analimbitsa mkulu-osalimba polyethylene) ethylene), etc. Chachiwiri, kukula kwa chitoliro pulasitiki ...
Werengani zambiri