The paper introduces the application, main alteration plan and the setting of relational parameters of technique of alternating current frequency conversion in Longmen planer′s electrical alteration.

介绍交流变频调速技术在龙门刨床电气改造中的应用和总体改造方案及有关参数的设置。

youdao

Although they have not been found to cause any harm, the cables on conventional pylons, which transmit a three-phase alternating current, generate a strong electric field and a continuous buzz of low-frequency radio waves.

ECONOMIST: Monitor