long steep grade

基本解释

• [交通运输工程]长大坡度

英汉例句

双语例句

• Based on special experiments, this paper is devoted to several technical issues of run- away of freight trains during long detention on electrified steep grade and associated countermeasures.
  结合专门试验论述了货物列车在大坡道上长时间停留时溜逸与防溜的若干技术问题。

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专业释义

交通运输工程

• 长大坡度