beam pump
短语词组
- beam engine pump 横梁发动机泵
- balance beam engine pump 发动机平衡杆泵
- beam balanced pump 游梁式抽油机
- beam -pump unit 游梁式抽油机
- balance e beam engine pump 发动机平衡杆泵
- walking beam pump 杆式泵
- beam pump well 杆泵井;游梁式抽油井
- beam pump unit 游梁抽油机
- walking beam pump coupling 杆式泵联轴器 返回 beam pump