... polypropylene 聚丙烯 polypropylene lining 衬聚丙烯 polyrod antenna 介质天线 ...
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polypropylene lining tube 衬聚丙烯管
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The polypropylene fiber reinforced concrete, which is a new type of the tunnel lining structure, has the characteristic of easy construction and can improve the concrete behavior and durability.
聚丙烯纤维喷混凝土作为隧道锚喷支护中的新型支护方式，具有施工便捷特点，并可以改善混凝土的性能和耐久性。
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