It was found that the import polypropylene copolymers were random ethylene and propylene copolymers with long line chain polyethylene.
结果表明，进口共聚聚丙烯涂覆料是含有聚乙烯长直链的乙丙无规共聚聚丙烯。
The invention relates to a while random copolymerization polypropylene (PP-R) light resistant pipe which comprises a white (PP-R) water pipe.
本发明涉及一种白色无规共聚聚丙烯阻光管。
The invention relates to a while random copolymerization polypropylene (PP-R) light resistant pipe which comprises a white (PP-R) water pipe.
本发明涉及一种白色无规共聚聚丙烯阻光管。
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