发布时间:2025-01-31 14:21:46
不能用钢刷会把玻璃刮花的。用盐酸,如果水泥凝固成一块一块,在上面到少许盐酸过10分钟用抹布就可以擦掉,如果是一片一片的,直接用带有盐酸的抹布去清洗。
弱电线管定额 硬质塑料阻燃管 跟半硬质塑料阻燃管 有什么区别
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