Automatic quick find star: signal is keep out interrupt immediately after recovery.
自动快速寻星：信号被遮挡中断后，立即恢复。
The foundation of automatic block and cab signal is track circuit.
自动闭塞和机车信号的基础是轨道电路。
Signal transmission is the principal part of automatic control system for wellbore trajectory.
信号传播是井眼轨道自动控制系统的重要组成部分。
Signal transmission is the principal part of automatic control system for wellbore trajectory.
信号传播是井眼轨道自动控制系统的重要组成部分。
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