旗语通信手册

例句：

1. 1. The military uses flags to communicate with each other during battles.
   军队在战斗中使用旗帜进行沟通。
2. 2. The flag code manual provides instructions on how to interpret flags during emergencies.
   旗帜代码手册提供了在紧急情况下解读旗帜的指导。
3. 3. In the old days, people used flags as a way of communicating with each other.
   在旧时代，人们用旗帜作为相互沟通的方式。