мартенівський мазут
open burning and open detonation (OBOD) (= open-pit)
open country / open ground
engine oil reservoir / engine oil tank
oil gauge / oil-gauge
ammonium nitrate-fuel oil (ANFO)
fuel oil barge (YO)
fuel-oil tank
diesel-fuel oil
fuel and oil servicing truck
fuel oil tap
bunker fuel oil
liquid oil fuel
oxygen-oil rocket fuel
fuel oil
Proton Exchange Membrane Fuel Cell (PEM fuel cell, PEMFC)
break-open
open arrest
open attack
open barrel sight
open boat
open column
open emplacement
open fire
open flank
open formation
open hostilities
open order
open out
open position
open range
open route
Open Skies Treaty