I. Awọn ẹya ara ẹrọ: 1. upvc pipe, ti a tun mọ ni pipe polyvinyl chloride pipe, u-pvc pipe, jẹ iru agbara ipata ti o lagbara, acid, alkali salt oil alabọde ogbara resistance, iwuwo ina, agbara ẹrọ kan, awọn ipo hydraulic to dara. , rọrun fifi sori, ṣugbọn o rọrun lati ti ogbo, ga te ...
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