valve piston
短语词组
- valve type piston 阀式活塞
- valve operating piston 阀动活塞
- release valve lower piston 缓解阀下活塞
- valve balancing piston 阀平衡活塞
- release valve upper piston 缓解阀上活塞
- main valve lower piston 主阀下活塞
- valve type piston pu 阀形活塞泵
- valve type piston pump 阀形活塞泵
- main valve upper piston 主阀上活塞 返回 valve piston