спостереження при малому зміщенні
axial observation spotting
observation point / observation post (OP)
axial-flow (jet) engine
axial-flow turboshaft engine
axial load
axial pressure
axial bearing
axial exit nozzle
axial flow compressor
axial piston pump
axial velocity
axial-flow turbine
axial (component of) induced velocity
axial fan
axial flow
axial mining
axial percussion bracket
axial-lateral conduct of fire
axial time bracket
axial ratio
close observation
command-and-observation post
forward observer (FO), forward observation officer; (artillery) observer / spotter
hostile observation
infrared night vision observation device
observation aircraft (O; obsn acft)
observation facilities
observation flight
observation patrol
observation satellite
observation slit
supervise the observation of armistice conditions