推杆回复
推杆回复
本发明能使腕关节得到早期的功能锻炼,又不影响骨折的固定和恢复。
During oil recovery by rod pump, owing to the elastic stretching and shrinking of the tubing string, the stroke loss of the subsurface pump reaches 10%.在有杆泵抽油过程中,因油管弹性伸缩,抽油泵冲程损失达10%以上。
The rod pumping is the predominance mechanical recovery mode in world petroleum production, the system dynamical simulation is the base of system efficiency analysis and optimum design.有杆泵抽油是世界采油工程中一直占主导地位的机械采油方式,系统动态模拟是系统效率分析和优化设计的基础。