水平定向钻进铺管技术是一种现代的非开挖施工新技术。

The horizontal direction drilling technology is a new one in modern non-excavating construction.

youdao

水平定向钻进铺管技术是一种现代的非开挖施工新技术。

The horizontal direction drilling technology is a new one in modern non-excavating construction.

youdao