The two different categories are multi-blade wind wheel and high speed wind wheel.
两种不同类别是指多翼风轮和高速风轮。
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。
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。
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