China's mines are hoist AC Induction Motor Drive, and its electrical control system uses a rotor series, cutting speed resistance , by the relay - contactor control devices constitute a logical.
我国矿井提升绞车大多是采用交流异步电机拖动，其电气控制系统采用转子串、切电阻调速，由继电器-接触器构成逻辑控制装置。
A new type of optimum cutting and throwing soil component combining reverse rotational rotor with the blade with open type bulldozer blade was developed.
该文研制了逆转刀辊与开式推土铲组合的切抛土部件。
A new type of optimum cutting and throwing soil component combining reverse rotational rotor with the blade with open type bulldozer blade was developed.
该文研制了逆转刀辊与开式推土铲组合的切抛土部件。
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