国产又粗又黄又爽又爽的视频-国产欧美一区二区三区在线老狼-精品久久久久久亚洲专区-日韩免费专区一区二区三区

本產(chǎn)品是以苯乙烯-丁二烯-苯乙烯（SBS）嵌段共聚物改性瀝青作為涂覆層，并將改性瀝青涂蓋于聚酯胎基，表面覆以聚乙烯膜（PE）、細(xì)砂（S）、礦物粒料（M）所制成的片狀防水卷材。

product is a kind of flexible sheet waterproof material using styrene-butadiene-styrene (SBS) modified bitumen as dipping and coating material, and the reinforcement layer is based on polyester felt, with the surface covered by isolation materials, such as polyethylene film, fine sand, mineral slice (or particle), etc.