On a line equipped with ATP as shown above, each block carries an electronic speed code on top of its track circuit.
在线被装备AT P依照被显示以上，各个块运载一个电子速度代码在它的轨道电路顶部。
On a line equipped with ATP as shown above, each block carries an electronic speed code on top of its track circuit.
在线被装备AT P依照被显示以上，各个块运载一个电子速度代码在它的轨道电路顶部。
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