The main requests of the In-Wheel-Motor are small size, high speed and high power density.
轮毂电机要求体积小、转速高、功率密度高。
They are also called battery capacitors, for their high energy density and high power density.
它具有比静电电容器大得多的能量密度，又有比二次电池大得多的功率密度。
High phase order power transmission is an important method to increase the power density transmitted.
多相输电是提高输送功率密度的重要方法。
Microwave power density (microwave field strength) is an important parameter in field strength metrology.
微波功率密度(微波场强)是场强计量中的一个重要参数。
Microwave power density (microwave field strength) is an important parameter in field strength metrology.
微波功率密度(微波场强)是场强计量中的一个重要参数。
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