Scientific classification should satisfy three requ ir ements: no omission, no intersections and being flexible to be operated.
科学分类应当满足无漏、无交叉、易操作三个条件。
An Area Control Computer Interlocking System (AC-CIS) im pl ements integrated control over station interlocking, section block, and dispatching and command.
区域计算机联锁系统实现车站联锁、区间闭塞和调度指挥一体化控制。
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