下螺母凸顶的滑动零件上有一条小弧线充当楔块。
A small curve in the sliding part of the convex top of the lower nut acts as the wedge.
如果气门间隙需要调节，松开摇臂调节螺丝上的防松螺母，转动调节螺丝直到测隙规滑动时稍带阻力为止。
If valve clearance needs to be adjusted, loosen the locknut on rocker arm adjusting screw. Turn adjusting screw until feeler gauge slips with a slight drag.
锁紧螺钉和螺母能够松开用以允许外侧框架和内侧框架 抵住宽度调节板滑动。
The retainer bolts and nuts can be loosened to permit the lateral frame and the medial frame to slide against the width adjustment plates.
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