油气井井下作业设备液压式轧辊压下装置
Work - over equipment for oil and gas wells hydraulic roll screwdown
油气井井下作业设备
Work - over equipment for oil and gas wells
油气井井下作业设备缩短立井井筒凿井施工准备期的经验
Work - over equipment for oil and gas wells Experience on the shrink shaft drilling construction reserve period