Borehole orifice-pipe can be installed using pre-bury or later-bury method.

孔口管的安设方法有预埋式和后埋式。

youdao

Borehole orifice-pipe can be installed using pre-bury or later-bury method.

孔口管的安设方法有预埋式和后埋式。

youdao