双闸板 Double disc ; Double e disc
双闸板平板闸阀 Double Disc Flat Gate Valves
明杆平行式双闸板闸板 Double Disk Parallel Gate Valves ; Double Disk Parallel ; DoubleDiskParallelGateValves
平行双闸板 double disc parallel seat
双闸瓦制动器 two shoe brake ; doubre block brake ; doubre shoe brake
双闸门 double gate ; double locks
明杆平行式双闸滑阀 rising-stem double-disk parallel slide valve ; disk parallel slide valve
双闸阀 double gate valve
双闸板型防喷器 double ram type preventer
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.
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.
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.
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