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signal operating instructions
тех.	instrucciones de operación de las transmisiones; órdenes para el servicio de transmisiones
Английский тезаурус
Signal Operating Instructions
воен., сокр.	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)