Nco ntsoov hais peb, nws yuav tsum yog: PPR, PVC, PE 1. Feem ntau siv cov kav dej yas yog: PPR (polypropylene), PVC (polyvinyl chloride), PB (polybutene), PE-RT (polyethylene tshav kub), PE (polyethylene) \ HDPE (reinforced high-density polyethylene) ethylene), thiab lwm yam. Thib ob, qhov loj ntawm cov yeeb nkab yas...
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