发布时间:2025-02-03 00:19:53
毛高?应该是层高吧?层高就是从地面算到上面楼板的顶面。一般楼板厚度大概是120mm到200mm左右。
鱼缸潜水泵各部位名称以图为例主要是连接机头和滤网之间的那块有进气口俩出水口的那个东西叫什么
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