Tabbatar cewa uku, ya kamata ya zama: PPR, PVC, PE 1. Filayen filastik da aka fi amfani da su sune: PPR (polypropylene), PVC (polyvinyl chloride), PB (polybutene), PE-RT (polyethylene mai zafi), PE (polyethylene) \ HDPE (ƙarfafa polyethylene mai ƙarfi) ethylene), da sauransu. Na biyu, girman bututun filastik ...
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