Выражение встречается в следующем контексте:

1.3 Lube oil system
Lubrication oil system consisting of:
• Turbine rotor driven main oil pump of centrifugal type with booster injector
• Booster ejector for main oil pump
• Auxiliary (start up) pumps AC motor driven (2x100%)
• Emergency oil pump DC motor driven
• Jacking oil pumps (1 AC and 1 DC motor driven)
• Full capacity duplex oil filter
• 2 x 100% oil coolers
• Main oil tank with meshes and instruments for level indication and protection
• Pressure reducing valve for lubricating oil
• Collecting oil tank with repumping facility
• Motor driven oil mist extraction fans (2 x 100%) on the oil tank
• Mixing thermostatic valve (AMOT) for lube oil temperature control
• Oil purification and preheating unit
• All oil pressure and drain pipe lines and fittings and supports

Заранее спасибо