英德
有道
百度
谷歌
图片
维基
百科
壁孔
aperture
mural pore
septulum
mural pore
septulum
- 打井孔时，要放入一根钢管，以防孔壁倒塌和地下水流入。
As the hole is made, a steel pipe is pushed down to stop the sides from falling in, and to keep out water. - 以罐壁开孔距纵向焊缝过近缺陷的处理为例，介绍底圈局部壁板的更换方法。
Taking a defect example that manhole is close to vertical welding this article introduces how to treat the defect in replacement of partial bottom wall. - 介绍了大型油罐罐壁开孔补强的两种常用结构,即补强圈搭接和插入式补强结构。
Two general structures for opening and reinforcement in the wall of large-scale oil storage tank, i.
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