There are still some shortages in the design of U-shaped cross section channel with concrete lining.

明渠衬砌U形断面渠道设计中仍存在一定的缺陷。

youdao

There are still some shortages in the design of U-shaped cross section channel with concrete lining.

明渠衬砌U形断面渠道设计中仍存在一定的缺陷。

youdao