аерологічне спостереження
observation point / observation post (OP)
upper air fallout
upper-air layer
upper air
upper air route
upper-air density
upper-air sounding
upper-air weather chart
air observation post observer
air observation
air observation post
air observation post flight
air observation post squadron
land-based upper layer (LBUL)
Sea-Based Upper Layer (SBUL)
upper deck
upper layer
upper sideband (USB)
upper glacis plate
adjustable upper sling swivel
upper ball race
upper center crankshaft bearing
upper edge of front sight
upper front crankshaft bearing
upper front plate
upper hemisphere
upper insulator gasket
upper motor lubricant
upper proximity dot (of a gyro gunsight)
upper rear crankshaft bearing
upper sling swivel
upper tank