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train block system
行车闭塞法
通过相邻车站、线路所、闭塞分区的设备或人为控制,使列车与列车相互间保持一定时空间隔,以保证列车运行安全的行车方法。
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perfect graph theorem
perfect group
perfect ideal
perfect image
perfect imaging
perfect inelastic collision
perfect information
perfect inverse image
perfection
perfectionism
perfect irreducible mapping
perfect isometry
perfective maintenance
perfect kernel
perfectly diffusing sphere
perfectly diffusion
perfectly normal space
perfectly separable space
perfectly weighted tree
perfect magic cube
perfect magic square
perfect mapping
perfect mapping; proper mapping
perfect matching
perfect measure
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