單項(xiàng)選擇題TGLG駝峰高靈敏軌道電路當(dāng)受端采用GLG­J­Ⅱ型接收器時(shí),軌道區(qū)段長(zhǎng)度≤()

A.1000m
B.1150m
C.1200m
D.1250m


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