一般拖轮由顶推作业改为艉拖作业或反之，不仅费时费工，而且操作不便。

The common practice to change from the pushing operation to towing, or vice versa, is both time - consuming and power - wasting, and it is hard to operate as well.

youdao

一般拖轮由顶推作业改为艉拖作业或反之，不仅费时费工，而且操作不便。

The common practice to change from the pushing operation to towing, or vice versa, is both time - consuming and power - wasting, and it is hard to operate as well.

youdao