1、

Mine, the causes of natural thermal potential difference in return air in main shaft and its influence on mine ventilation system and the control methods.

阐述了造成主井回风的自然热位差产生原因和对通风系统的影响,以及治理办法。

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2、

Determination of shaft sidewall potential destruction region under multiple load and coupling action

多荷载耦合作用下立井井壁潜在破坏区的确定

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3、

In addition, USES frequency conversion device to change electric axis of the rotor circuit induced potential frequency, also can realize electric shaft system, but for this short speed working a pyrrhic victory.

此外,采用变频装置改变电轴转子回路中的感应电势的频率,也能实现电轴系统的调速,但对于这种短时工况是得不偿失的。

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4、

after continual development for decades, micro electrical discharge machining ( micro-edm) is not only applied for machining micro-shafts, micro-holes and micro three dimensional structures, but also shows excellent potential for machining silicon materials.

经过几十年的发展以及加工工艺的不断完善,微细电火花加工不仅仅适用于微细轴、微细孔的加工,还能够进行三维微结构的加工。

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5、

The air flows down to a shaft and thus loses potential energy.

空气向下进入竖井,因而失去势能.

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