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ocean workover rig
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ocean workover rig
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海洋修井机
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ocean workover rig
海洋修井机
由一台或两台动力驱动绞车和转盘组成的适合海上平台作业的特殊修井装置。
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policies for disaster risk reduction of agriculture
policies for the development of agricultural science and technology
policies of agricultural pollution treatment
policies of returning marginal farmlands to forests
policies of utilization,restriction and reform
policies on agricultural land property rights
policing command platform
policing intelligence analyst
policing intelligence dissemination
policing intelligence education
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