于整个电压范围内扭矩固定。

Fixed torque throughout the entire voltage range.

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发动机是极其众所周知，其耐用性，燃油效率高和良好的低到中期范围内扭矩。

The engines are extremely well known for their durability, high fuel efficiency and good low to mid range torque.

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因此，AC输入电机和驱动系统具有在很宽的转速范围内扭矩特性优越，从低到高的速度，提供了大速比。

Thus, the ac input motor and driver system has superior torque characteristics over a wide speed range, from low to high speeds, offering a large speed ratio.

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