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Mainly by the seal, anchor, righting the commutation of three parts, sealing parts: seal oil seal spacer sleeve annular space. Anchoring parts: the establishment of the casing wall anchor for the seat in order to achieve closure. Track commutation part: When seated, the track pin swap items from the role.
 31/2″EUE.59×17.5F Mid Joint |  27/8″EUE.59×17.5F Mid Joint |  31/2″EUE.59×17.5FCable protector |
 27/8″EUE.59×17.5FCable protector |  Stuffing box |  Sucker Rod Series |
 Tubing |  Pumping Unit |