heavy jackstay storing rig 重货补给索具
hydraulic energy-storing workover rig 液压蓄能修井机
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In the light of the status of energy waste of conventional workover rigs, Model XXJ300/500 hydraulic energy-storing workover rig is developed.
针对现有常规修井机存在的能量浪费现象，研制成节能型XXJ300／500液压蓄能修井机。
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