速度为100km/h以下正线道岔轨道静态经常保养水平容许偏差管理值为()。
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到发站线道岔轨道静态作业验收高低容许偏差管理值为()。
采用抛物线形竖曲线时,每20m竖曲线长度的变坡率,凹型应不大于()。
What specific jobs do securities outside dressing rooms do？
A. In addition to ensuring the life style of the performers, they should prevent any person from entry.
B. In addition to ensuring the life safety of the actors, they should stop any reporters from entering
C. In addition to ensuring the life safety of the performers, they should prevent any fans from entering
D. In addition to ensuring the life safety of the performers, they should prevent any unauthorized person from entering
导曲线根据需要设置6mm超高,并在导曲线范围内按不大于()顺坡。
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