明杆平行式双闸板闸板 Double Disk Parallel Gate Valves ; Double Disk Parallel ; DoubleDiskParallelGateValves
电动平行式双闸板闸板 ElectricDoubleDiskParallelGateValves ; Aspirating valves ; Electric Double Disk Parallel Gate Valves ; Electric c Double Disk Parallel Gate Valves
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