non-rising stem valve 不升杆式阀 ; 暗杆阀

long stem valve 长杆阀

ono-rising-stem valve 暗杆阀门

stem valve coupling 推杆阀快速接头

Dimension of valve stem head 阀杆头部尺寸

Valve stem guide [车辆] [机] 气门杆导管 ; 气门导管 ; 阀杆导件 ; 活门杆导承

valve stem unbalance [机] 阀杆不平衡力

hollow stem valve 空心阀杆气门