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.

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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.

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