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.

youdao

公司生产的矿井提升机是一款双闸系统，高强度的绳索拉升能力可满足您的要求。

All TIMBERLAND shaft Sinking Hoists feature dual braking systems, power up-power down load control and rope capacities to suit your shaft requirements.

youdao

你们能看到这个双端闸床破裂，压力大约是在20到25磅每平方英寸。

You can see in this double ended guillotine break the pressure was around twenty two to twenty five psi.

youdao