1. railway signaling in station 
   铁路车站信号
2. reliability efforts in railway signaling 
   铁路信号可靠性
3. principle of fail-safe in railway signaling 
   铁路信号故障-安全原则
4. remote control and indication system for railway signaling 
   车站信号遥控遥信
5. rules and regulations in railway traffic and operation 
   铁路运输规章

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• 1. 铁路信号规则
  quarantine regulation 检疫规定...railway signaling regulations 铁路信号规则...ratio regulation 变压比调节; 比例调节(热能动力装置中随燃料供应的空气供应的调节)
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