The invention relates to a hydraulic drive gate valve for welding type high-temperature resistant bellows, in particular to a hydraulic drive gate valve.
一种液压传动的焊接式耐高温波纹管闸阀，涉及一种液压传动的闸阀。
2
The invention relates to a pneumatic gate valve for welding type high-temperature resistant bellows, in particular to a pneumatic gate valve.