求翻译：矿用电机车是煤矿生产中的一种重要运输装置。直流调速控制作为电气传动的主流在现代化生产中起着主要作用。长期以来，直流电动机因其具有调节转速比较灵活、方法简单、易于大范围内调速、控制性能好等特点，一直在矿用电机车应用领域占有统治地位。所以本系统采用直流调速。是什么意思？

Mine electric locomotive is an important coal production, transport units. DC speed control plays a major role in the modernization of production as the mainstream of the electric drive. A long time, the DC motor because of its more flexible, adjust the speed, the method is simple, easy to a wide ra

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The mineral product electric locomotive is in the coal mine production one kind of important conveying arrangement.The direct-current velocity modulation control took the electrical transmission the mainstream is playing the main role in the modernized production.Since long ago, because the direct c

正在翻译，请等待...

正在翻译，请等待...