发布时间:2025-02-03 11:31:30
琴钩不用组装吧?一般是钩子上方有个洞,直接在那里敲钉子固定在墙上。还有一种是本身就是个大钉子,敲到墙上后就可以挂了。
钢结构的厂房四周没有墙 防雷测试点怎么安装啊 详细点 最重要的把测试点的原理说明白
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