Related terms:
could handle
decca navigator system
call buttons
human operator
communication protocols
wireless intercom
wall mounted
fixed wiring
intercom systems
remote terminal unit
push button
j m
two tone
lines of position
each station
programmable logic controller
rtu
devices such
data acquisition
knockouts
Wikipedia sources:
SCADA
Decca Navigator System
Intercom
GPO telephones
GEE (navigation)
Context for words:
master
station
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