внутрішній вал (верхнього несучого гвинта)
hollow shaft (of lower coaxial shaft)
upper and lower coaxial rotors
coaxial-rotor helicopter
propeller shaft (drive shaft)
rotor synchronizing shaft
tail rotor drive shaft
tail rotor drive shaft in pylon
lateral dual rotor system / side-by-side rotor helicopter
main-rotor head / main-rotor hub
main-rotor hub / main-rotor head
coaxial rotors
coaxial machine gun
coaxial mounting
coaxial
land-based upper layer (LBUL)
Sea-Based Upper Layer (SBUL)
upper air fallout
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