non-rising stem valve

暗杆,non... ... ) dowel bar 暗销杆 ) non-rising stem valve 暗杆阀 ) Inside screw nonrising stem type gate valve 暗杆闸阀 ...

valve... ... non-return valve 单向阀; 单向活门 non-rising stem valve 不升杆式阀 normal close valve 常闭阀; 常关阀 ...

美国尼必可青铜与铸铁... ... 明杆阀门 Rising Stem Valve 暗杆阀门 Non-Rising Stem Valve 最小"A"尺寸 Minimum ”A“ dimension…