The functional design and hardware component of control system were introduced, and the control calculation of driving ring plate with step motor was deduced in details.
介绍了控制系统的功能设计及硬件组成，重点推导了用步进电机驱动钢领板的控制算法。
Driving on the third ring road in Beijing, I felt like was watching a movie in fast-forward.
驱车行驶在三环路上，我感到仿佛是在观看一部快进的电影。
B If you are driving, go round the Third Ring Road and head north.
B如果你开车的话，沿着三环往北开。
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