SIDE SEAM POCKET侧缝开袋
side vertical pocket position直袋位线
side seams pocket侧缝口袋;边缝口袋;缝袋方
side-pocket侧袋账户
side-pocket gas-lift mandrel偏心气举阀工作筒
Flow-control devices for side-pocket mandrels偏心轴的流控制装置
Running Side Pocket Plug投偏心堵塞器
SIDE POCKET OPENING侧袋开口
Side Pocket Mandrel偏心工作筒