The indispensability and principle of the automatic classification humping yard system is introduced in this paper.

本文介绍了编组驼峰自动化系统的必要性和工作原理。

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The Type 45 Destroyer Duncan was due to leave BAE System's Scotstoun yard on Friday for Portsmouth Naval Base.

BBC: HMS Duncan

The sixth, Duncan, left BAE System's Scotstoun yard on the Clyde on Monday for Portsmouth where it will undergo sea trials.

BBC: HMS Defender commissioning ceremony held in Portsmouth

In July, for example, while the Elkhart yard was rebuilding 26 miles of track, the system diverted 500 cars a day to other yards.

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