Down Swing

基本解释下杆,向下挥杆

网络释义

1)Down Swing,下杆,向下挥杆2)lower guide link,下导向杆3)projected-vertical-plane method of orienting,钻杆定向下钻法4)screw-down stop valve,螺杆向下止动阀5)lower connecting rod,下连结杆;下拉杆6)In-to-out,内向外挥杆

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