【单选题】
锯轨后的钢轨长度误差应不超过___mm。
A. 1
B. 2
C. 3
D. 4
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答案
B
解析
暂无解析
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钻孔后,螺孔孔径允许误差为___mm。
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测量曲线正矢时,应该使用___m弦。
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测量曲线正矢时,应该在钢轨踏面下___mm测量。
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拨道时,回弹量一般预留___mm
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在曲线进行拨道时,测量小方向应该用___m弦。
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