正线曲线半径为650m,缓和曲线的正矢与计算正矢差允许为()。
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同向曲线两超高顺坡终点间直线长度,困难情况下不应短于()。
直线型尖轨,尖轨长度为6250mm以下,尖轨尖端的轨距为()。
Any open flame can’t exist in this business building
A. Yes. We’ve removed all the flammable gas.
B. Yes. We’ve searched everywhere for flammable liquid
C. Yes. All the flammable liquid and gas have been removed already.
D. Yes. We’ve removed all the liquid, gas and wood which can be burned