发布时间:2025-01-20 12:16:22
HDPE双壁波纹管采用橡胶圈承插连接。HDPE缠绕B型结构壁管,可以采用橡胶圈承插,但一般都采用热熔承插连接,比橡胶圈更牢靠。考虑到如果沟槽排水困难,用橡胶圈承插。
隔离期间在自己农村的小院待着呢邻居也在他的小院待着都不戴口罩会交叉感染吗
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