广西北海哪里有学农用车证，就是那个后驱动，除了东山路那一个。
Where Guangxi North Sea has learning agricultural production to use vehicle to prove, it is that queen to drive, except that Dong Shan county Road one.
L 297芯片产生脉宽可调的脉冲相序信号，该信号作为双极性桥式功率驱动电路的输入信号，放大后驱动步进电机。
L297 chip generates pulse phase sequence signals of which the pulse width is adjustable. The signals are the input ones of dual bridge driving circuit and drive the stepper motor after amplification.
另一种技术使用可移动的镜面将太阳光线聚焦到采集塔，采集塔上的接收器中含有流动的熔盐，熔盐加热后驱动发电机运转。
Another technique USES moveable mirrors to focus the sun's rays on a collector tower, where a receiver sits. Molten salt flowing through the receiver is heated to run a generator.
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