伺服电机利益是精度高，速度快，照料以毫秒计算，缺点是本钱相对名贵。
Servo motor is of high precision, speed and care with milliseconds, the disadvantage is that capital is relatively rare.
演示程序接受3个参数：以秒计算的运行时间、生产线数量、以毫秒计算的罐子到达的时间间隔。
The demo takes up to three arguments: run time in seconds, number of production lines, and period between jars arriving in milliseconds.
interval 用分钟计量，而 _LastUpdated 和当前时间的差以毫秒计算。
The interval is measured in minutes, with the difference between _LastUpdated and the current time measured in milliseconds.
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