Dual tone multi frequency technique in Semi-automatic Block System
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引用本文: | 杨进, 杨城. 双音多频技术在半自动闭塞中的应用[J]. 铁路计算机应用, 2014, 23(12): 40-42. |
Citation: | YANG Jin%YANG Cheng, . Dual tone multi frequency technique in Semi-automatic Block System[J]. Railway Computer Application, 2014, 23(12): 40-42. |