General bituminous coal mining; Motor freight.

一般烟煤开采；汽车货运。

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This paper introduces a new method of the mining electric locomotive, which is droved by AC asynchronous motor, speed-control system.

提出了一种新的由交流异步电动机拖动的矿井电机车调速系统。

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Secondly, on the basis of the methods of parking demand predict are analyzed, this paper put forword the motor vehicle od parking demand predicting model based on data mining.

然后在分析总结停车需求预测方法的基础上，提出了基于数据挖掘技术的机动车OD停车需求预测方法，并建立了相应的数学模型。

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Already he's seeing pet projects, such as new mining shovels and motor graders, postponed until next year.

FORBES: Sharpening the claws