发布时间:2025-02-01 01:58:33
网络线插头?注的是什么材料啊?PC?PA?
老实说,好多塑料说是环保无毒,不过其实指的是常态下的成品。
而你注塑生产过程的高温,肯定会连塑料分解好多对人体有毒的气体。
所以长期呆的话。肯定会对身体有影响的
我想在楼房的棚顶装隔音材料不知道哪种材料隔音效果好能达到什么
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