signaller [ˈsɪgnələ(r)]

例句:

• A trained signaller can tap out messages at treat speed on the Morse key.
  受过训练的通信员可用莫尔斯键快速发电报.
  
• She later trained disastrously as a glider pilot and then as a signaller for the WRENS.
  来自THETIMES
• Network Rail said he had not contacted the signaller to request permission to cross the line.
  来自THETIMES