Double Disk Parallel Gate Valves 明杆平行式双闸板闸板 ; 明杆平行式双阀板阀板 ; 明杆平行式双闸板闸阀

parallel gate valve 平行式闸阀

parallel single disk gate valve 单阀碟双面平行密封闸阀

parallel slide gate valve 平行滑动闸阀

gate parallel condenser 控制极并联电容器

Parallel plane disc gate valves 平板闸阀

parallel expanding gate 平行扩张式闸板

parallel disc type gate valve 平行闸板式闸阀