free channel

• 明渠

free channel的用法和样例：

例句

1. Open Channel and Longitudinal Cofferdam Project Attributed to CGGC.
   承建的导流明渠和纵向围堰工程。
2. It was aimed at the hydraulic-sediment problems arising from 90 lateral open channel water intaking.
   明渠岸边横向引水是被广泛采用的一种取水方式。