龙滩水电站左岸导流洞开挖采用分层开挖法。

The excavation of the left-bank diversion tunnel of Longtan Hydropower Project adopts the excavation by layer.

youdao

龙滩水电站左岸导流洞开挖采用分层开挖法。

The excavation of the left-bank diversion tunnel of Longtan Hydropower Project adopts the excavation by layer.

youdao