rotary motion valve [自] 角行程阀

linear motion valve [自] 直行程阀

link motion valve gear 连杆阀动装置 ; 连杆配汽机构

link motion valve 链杆操作阀

valve motion arm 阀驱动臂

linear r motion valve 直行程阀

rotary y motion valve 角行程阀

valve motion [机] 阀动

Gooch valve motion 古氏阀动装置