counterpropeller是什么意思

用法例句

Contaminated bottom sediment in water system was apt to be disturbed by navigation, especially by propeller jet flow behind the boats.

河流、湖泊中船舶的航行对于水体底部的污染沉积物具有很强的扰动作用,特别是船舶尾部的螺旋桨射流。