ʻO ke kāʻei kāʻei PP, ka inoa ʻepekema polypropylene, he plastic maʻamau i kahi māmā, ʻo PP me ka mea nui he polypropylene drawing grade resin, no ka maikaʻi o ka plasticity, ikaika tensile ikaika, kūlou ʻana i ke kūpaʻa ʻana, ke kaumaha māmā, maʻalahi e hoʻohana, etc. . Ua hana ʻia i kahi kaula, ua w...
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