They are powered by an electric motor or an engine, connected through gears, belts, or a flexible elastomeric coupling to reduce vibration.
他们采用电动马达或引擎，通过连接的齿轮，皮带，橡胶或弹性耦合，以减少振动。
They are powered by an electric motor or an engine, connected through gears, belts, or a flexible elastomeric coupling to reduce vibration.
他们采用电动马达或引擎，通过连接的齿轮，皮带，橡胶或弹性耦合，以减少振动。
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