The step motor controller composed of buffer register, the circular allotter, the control logic, the positive run and back run control circuits is replaced by computer software.

由缓冲寄存器、环形分配器、控制逻辑及正反转控制门组成的步进电机控制器则用计算机软件替代。

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Buffer register, circular allotter, control logic, positive run and back run control circuits are replaced by computer software.

由缓冲寄存器、环形分配器、控制逻辑及正反转控制门组成的步进电机控制器则用计算机软件替代。

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McMillan was one of nine people killed when her train, under automatic computer control, apparently failed to register a signal and avoid a collision with a train that had stopped near a curve between two stations.

CNN: Metro driver called a hero who saved lives in crash