但是，辅助船闸没有牵引设备，因此双闸拖轮需要有特殊的牵引船协助。
However, the auxiliary lock is not equipped with tow haulage equipment, so double lockage tows require special pull boat assistance.
对双铰底板式船闸闸室与土体的动力相互作用研究显得十分必要。
The research on dynamic interaction between soil and ship locks with double-hinged soleplate is important and necessary.
应用推荐