“semi-automatic block”的概念、定义、翻译、参考文献-科学参考

单词	semi-automatic block
释义	semi-automatic block Encyclopedia 工学铁路区间闭塞释 semi-automatic block半自动闭塞人工确认相邻两铁路车站间区间线路空闲、办理和解除闭塞，自动开放、关闭出发信号机的闭塞方式。
随便看	mean over the period mean over the row mean parallax mean-periodic function mean photoelectric magnitude mean photographic magnitude mean photovisual magnitude mean place mean pole mean pole of the epoch mean position mean-power approximation mean product mean profile mean proportional mean pulse mean p-valent function mean-quadratic regression mean radial velocity mean radiant temperature mean radiation intensity mean radius of curvature mean range mean recurrence time mean refraction

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