After the fixing bolt is completely screwed in the central hole of the screw, the upper end-face of the fixing bolt is lower than the upper end-face of the fixing sleeve pipe.

固定螺钉完全旋入螺杆中心孔后，固定螺钉的上端面低于固定套管的上端面。

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The utility model can increase the swing assisting Angle and the swing assisting strength through adjusting the central adjusting screw bolt to meet the requirements of different patients.

它通过调节中心调节螺杆可增加助摆角度和助摆力量，以适应不同患者的需要。

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The Central Line of the positioning screw bolt and an outlet shaft lever are coherent basically in order to adjust the front and back position of the outlet shaft lever.

定位螺杆与出轴杆两者的中心线基本一致，用以调整出轴杆前后位置。

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