Special Features:

Mtg method: any acceptable and chassis; mtg confg: four 0.140 in. Diameter mtg holes on 3.10 in. By 3.771 in. Mtg centers; fsc app data: aircraft gunnery fire control system

Properties:

Two or more different types of items having a common mounting or mounted on each other which together form a portion of an amplifier but which in itself is not a complete functioning item and cannot be assigned a more definite item name.