发布时间:2025-02-04 06:14:52
热水器怎么安装要视空间位置而定,如安装在天花板上面肯定要在集成吊顶前安装,且要留检修口,如安装在天花板下面则先安装集成吊顶再装热水器。
钢筋弯钩为30度45度60度90度180度时弯钩长度怎么计算计算公式是多少
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