twin rotors mounted longitudinally

dual rotors / twin rotors

twin rotors / dual rotors

engine mounted longitudinally

coaxial rotors

upper and lower coaxial rotors

wash from rotors

thrum of the engine (rotors etc.)

twin

twin engine aircraft

twin-barrelled

twin-mount

twin detonating fuse

cam and twin lever

coupled twin engines

dual spacing of twin tires

twin-spool compressor

twin electronic booster

twin temperature indicator

bow-mounted

helmet-mounted display (HMD)

hull-mounted sonar

motorized / mounted infantry

mounted

mounted combat

mounted grenade launcher

mounted infantry

mounted patrol

mounted police

mounted reconnaissance

tripod-mounted grenade launcher

turret-mounted weapon

armored vehicle mounted rocket launcher