... 双间隙头 dual gap head 双闸 dual gate 双图形 dual graph ...
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短语
双闸板
Double 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
平行双闸板
double disc parallel seat
双闸瓦制动器
two shoe brake
双闸门
double gate
明杆平行式双闸滑阀
rising-stem double-disk parallel slide valve
双闸阀
double gate valve
双闸板型防喷器
double ram type preventer
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