发布时间:2025-01-24 13:24:10
不是的,消防沟槽连接的管件,有沟槽管件弯头、三通等,机械三通是需要开孔安装的,沟槽三通不属于机械三通,因为不需要开孔安装,这个 参照《CJT_156-2001_沟槽式管接头》
陕西十大批发市场 陕西批发市场有哪几个 陕西大型批发市场在哪
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