发布时间:2025-01-24 13:33:21
是的。
石棉是天然的纤维状硅酸盐材料,不燃,可做保温绝热材料,但其中含有极小的纤维,容易被人体吸收,有致癌性,国际上开始禁用。矿棉是由硅酸盐熔融物制得的蓬松状短细纤维。按所用原料可分为岩棉和矿渣棉两大类。前者以火成岩、变质岩与沉积岩等天然岩石为主要原料,常用玄武岩、辉绿岩、角闪岩与泥灰岩等;后者以某些冶金矿渣为主要原料,如铁、磷、镍、铬、铅、铜、锰、钛、锌等矿渣。
无印良品的家具好不好,无印良品是我非常喜欢的风格,不知道质量到底怎样,有人买过吗
2025-01-24 13:33:21 2025-01-24 13:33:21 2025-01-24 13:33:21sketchup8导入3d后模型全变成黑色且不显示材质怎么解决
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