单线双向运行
Bidirectional Operation on Single Track
微机化站间自动闭塞
microcomputer blocking system
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
微电子交流计数电码自动闭塞
micro computer automatic block system with AC counting code track circuit
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