security and automatic device

stand-by and automatic device

active and automatic supply

and Automatic Alarm

and automatic anti-overflow valve

and Automatic control

and Automatic execution of plans

and automatic fairing machine

and Automatic monitoring

and Automatic rolling route control of humping yard

and Automatic speeding up and down

and Automatic switch

and Automatic train control

automatic and changing scan and control

automatic and hand-operated change-over switch

automatic and interactive

automatic and protective relay

automatic and reckoning instrument system

automatic and semi-automatic