Англійська ⇄ Іспанська Англійська Китайська +

signal operating instruction
косм.	信号操作指令
Англійський тезаурус
Signal Operating Instructions
військ., абрев.	SOI
signal operating instructions
США	A series of orders issued for technical control and coordination of the signal communication activities of a command. In Marine Corps usage, these instructions are designated communication operation instructions (JP 6-0)