... 阀轭yoke 外螺纹阀杆及阀轭outside screw and yoke(OS&Y) 阀杆stem ...
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Outside Screw and Yoke WOG 水 ; 油 ; 气工作压力
outside screw and yoke valve 外螺旋轭阀
OS&Y outside screw and yoke 明杆带支架
outside screw and yoke type 轭式外螺纹
OSandY outside screw and yoke 明杆带支架
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