back-up fire control

back-to-back circuit

back-to-back connection

back-to-back radio stations

back-to-back relay

individual control (of fire) / individual fire control

fire-control director / fire control director

fire control orders (FCO) ('Hold Fire', 'Cease Fire' and 'Engage')

slant fire; diagonal fire; oblique fire; fire to the oblique

bring back fire

anti-aircraft fire fire control equipment

anti-aircraft fire using fire control equipment

selector lever, fire selector, fire switch, fire selector switch

back-up system

cut back co-operation

I read back

play back kit

pull back

push back

read back

reverse engineering ( back- wards engineering)

Camel-back water pouch

Field Pack, Air Support Back

back brief / backbrief

peel back

back on the block

back-up circuit breaker

armor back plate

back bearing housing

back blow

back contact

back cushion

back fork