发布时间:2025-02-06 18:29:04
一般的油毡是用破布、废纸等为原料,高级的可掺用部分动物毛和矿渣棉等,加工时,将原纸通过熔融沥青,经热辊挤压,使沥青将纸层浸透,并挤出多余的沥青,表面撒布滑石粉或碎片云母等,冷却而成。
高级的油毡是用动物的毛或植物纤维制成的毡或厚纸坯浸透沥青后所成的建筑材料,有韧性,不透水,用来做屋顶、地下室墙壁、地基等的防水、防潮层。所以也叫油毛毡。
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2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04女生一般吃东西嘴巴有点难闻 那要怎么才能和男友接吻时 嘴巴甜甜的
2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04 2025-02-06 18:29:04