signal procedure

例句：

1. 1. The signal procedure for the new systemis quite complex.
   新系统的信号程序相当复杂。
2. 2. The engineers were instructed to followthe signal procedure during the test.
   工程师们在测试期间被指示遵循信号程序。
3. 3. Theprocedure for handling emergency situations was well-defined in the signal procedure manual.
   紧急情况处理程序在信号程序手册中得到了很好的定义。