短語詞組短語workover r rig 修井機barge workover rig 駁船修井設(shè)備portable workover rig 移動式修井機inclined workover rig 傾斜式修井機truck mounted workover rig 輪式作業(yè)機pressure balanced workover rig 不壓井修井機offshore workover rig base 海洋修井機底座conventional workover rig 常規(guī)修井作業(yè)機 返回 workover rig