Angielski ⇄ Angielski Chiński Hiszpański +

signal operating instructions
techn.	instrucciones de operación de las transmisiones; órdenes para el servicio de transmisiones
Angielski tezaurus
Signal Operating Instructions
wojsk., skr.	SOI
signal operating instructions
stan.	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)