他身旁的一位女销售人员则提供了另一个解决办法：在给新买的电动自行车上牌后，只需调一下电动机，就能将车子的最大时速恢复到20公里。
A nearby saleswoman offered another solution: After getting a new bike registered with police, a simple adjustment to the motor pushes the maximum speed back up to 20 MPH.
本文介绍了一种与直流无刷电动机配合使用的电动自行车控制器，着重论述了此种新型、实用的电动自行车控制器的系统构成和设计技术。
This paper introduces an electric bicycle controller combined with DC brushless motor, specially describes the system and control technology of the new mode and applied electric bicycle's controller.
一般电动自行车的电动机及传动装置、体积大、功率消耗大，并且和驱动轮分离，应该给予改进。
The motor and the driving device of a general electric bicycle which can be improved have big volume and big power consumption, and are separated with driving wheels.
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