信号兵，信号旗手，(铁道等的)旗工。的英文

flagman

• 信号:    signal; semaphore; ...
• 兵:    arms; weapons
• 旗手:    standard-bearer
• 铁道:    railroad; railway
• 等:    class; grade; rank
• 的:    4次方是 The fourth po ...
• 旗:    flag; banner; stan ...
• 工:    worker; workman; t ...