由车轴拆下螺帽，U型螺栓和弹簧支架。
为了防止术后反松，在螺帽与垫圈间又增加了一弹簧垫圈(5)。
In order to prevent the inverse loosing after the operation, the spring washer (5) is added between the nut and the washer.
由于弹簧活塞与螺帽相夹，备用锯条不会在L形管内窜动，便于在流动场地使用操作。
Because the spring pistons and the nuts are clamped, the spare saw blades can not flee in the L-shaped pipe, which is convenient to operate in a mobile field.
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