大家在查：密封比压硬密封球阀活塞式气动马达气压马达气动搅拌机保鲜箱安贞里中国环保科技控股有限公司化工期刊拉伸流变仪

固定球球阀

固定球球阀

求阀门、法兰英语... ... 浮动球球阀 float ball valve 固定球球阀 fixed ball valve 弹性球球阀 flexible ball valve ...

敏盛科技 ... 特殊合金系列球阀( Special Alloy) 固定球球阀( Turnnion Ball Valves) 浮动球阀( Floating Ball Valve) ...

Introduce the processing and property analysis by improving on machining of the shaft hole on fixed body .