It has been a problem how to calculate the wagon turnround time for routine railway plan and statistics simply and conveniently in theory and practice.

 
  • 鐵路日常計劃和統計中如何簡(jiǎn)便而準確地計算貨車(chē)周轉時(shí)間的問(wèn)題,在理論和實(shí)踐中一直是一個(gè)討論的課題。
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