The proper key has serrations that raise the metal pieces to the correct height above the slot, allowing the bolt to slide.
正确的关键有锯齿的提高金属片上面的槽正确的高度，使螺栓下滑。
The fracture characteristics of bolt connecting the pedestal with slipway in a two-way moving slide valve was analyzed.
对双动滑阀装置上连接基座与滑道的螺栓在使用过程中发生的断裂进行了分析。
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