论述了承插式铸铁管作井管的优点和设计原理，实践证明效果良好，值得推广。

The paper introduces design principle of pipe well using socket and spigot connected cast iron pipes as pipe material. The results are effective.

youdao

论述了承插式铸铁管作井管的优点和设计原理，实践证明效果良好，值得推广。

The paper introduces design principle of pipe well using socket and spigot connected cast iron pipes as pipe material. The results are effective.

youdao