сигналізатор відмови дублюючої гідросистеми
back-up hydraulic system
hydraulic failure
hydraulic pressure failure
instantaneous vertical speed indicator / instantaneous vertical-speed indicator (IVSI)
back-to-back circuit
back-to-back connection
back-to-back radio stations
back-to-back relay
self-contained hydraulic system
hydraulic-brake system
emergency hydraulic system
standby hydraulic system
hydraulic system hose
landing ramp hydraulic system charger
main hydraulic system
hydraulic system
vernier solo hydraulic power system
fuel system failure
critical single system failure
oil system failure
aircraft electrical system failure
indicator system
fire extinguishing system indicator disc
abbreviated visual approach slope indicator system (avasis)
visual approach slope indicator system (vasis)
back-up system
crushing by hydraulic press
directional-control hydraulic valve
hydraulic and insulating oils
hydraulic lock
hydraulic oil
hydraulic power