railroads


정의: Rail transport is a means of transport using wheeled vehicles running on tracks, which usually consist of two parallel steel rails. Rail transport is one of the two primary means of land transport, next to road transport. It is used for about 8% of passenger and freight transport globally, thanks to its energy efficiency and potentially high speed. Additionally, the track spreads the weight of the train which means larger amounts can be carried than with trucks on roads.


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핵심 연구 분야Cryptography
주요 연도2024년
주요 연관 키워드china
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