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1、
It has two stem sealing: one is stuffing box and another is toroidal sealing ring ( O-ring ) .
本阀阀杆密封分为两种形式: 一为填料密封;一为O型 密封环 密封.
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- 相关词组
- prize ringn.拳击场，拳击练习;
- give a ringn.打电话给某人;
- modular ring模环
- ring bindersn.活页夹；活页簿
- index of ring systems环系索引
- gas piston ring活塞压环
- give someone a ring打电话;
- ring around环状珠；环呼;
- ring up打电话;把钱款记入收款机;赚取;盈利;
- ring about包围，围绕;
- ring fingersn.无名指( ring finger的名词复数 );
- boxing ringn.拳赛场地;
- metal ring oscillator金属环振荡器
- intrauterine ring避孕环
- gate ring调节环(涡轮机)
- engagement ringn.订婚戒指;
- impeller mounting ring叶轮固定环
- gas ring laser环形气体激光器
- bishop's ring主教戒指;
- ring roadsn.环行路( ring road的名词复数 );
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- thousand n.一千;数千;许许多多;千位数;
- 360 three hundred and sixty
- street fighter 街头霸王;[电影]超级学校霸王;
- via prep.经由，经过;通过，凭借;
- maid n.女仆，侍女;少女;处女，未婚女子;
- socket n.插座;灯座;窝，穴;[解]眼窝，孔窝;
- ProcessOn 作图工具
- equilibrium n.平衡;均衡;均势;(心情、情绪)平静，安宁;心理平衡
- gym n.<非正>健身房;体育馆;室内健身操;体操;
- herself pron.（反身代词）她自己;（用以加强语气）她亲自，她本人;
- modem n.调制解调器;
- differ v.有区别;有分歧;
