A support hinge is arranged on the rotary elbow and is fixed on a reversingframe.
在所述旋转弯头上设有支承铰链，支撑铰链固定在回转架上。
2
Do research on the stress and deformation state in the condition of bending, braking, turning and reversing, and then make a program that improves the structure of the frame.
分析在弯曲工况、制动工况、转弯工况和扭转工况下的应力与变形状态，对应力集中位置结构提出改进方案。
3
The pumping unit described in this article consists of a frame-mounted mechanical reversing drum.