非自动闭塞区
non-automatic block section
18信息移频自动闭塞
18information frequency shift automatic block
无绝缘移频自动闭塞
free insulation frequency shift automatic block
Non-insulation automatic block modulated by frequency shi ft
信号自动闭塞
signal automatic blocking
移频自动闭塞
frequency shift automatic block
frequency shift modulated automatic block
Frequency-shift Automatic Blocking System
Audio frequency-shift modulated track circuit
自动闭塞
automatic blocking
Auto block
Automatic blocking system
automatic block system
Auto blocking
Auto-blocking
automatic block
自动闭塞电力线路
automatic blocking power line
auto block system power line along the railway
自动闭塞结合电路
Automatic block combined circuit
自动闭塞行车
Automatic Blocking of Running
微机化站间自动闭塞
microcomputer blocking system