air slide valve

backsight slide; back-sight slide

feed block slide (feed-block-actuating slide)

slide valve

check valve / non-return valve

non-return valve / check valve

slide

slide rule

retractor slide

elevating slide

barrel slide

blocking slide

elevation slide nut

escape slide

surface of slide

rear-sight slide cap

nautical slide rule

curve-slide sight

slide down a rope

slide hammer dent puller

radiation slide rule

death-slide

air valve bank

air breed valve

air input valve

air suction valve

auxiliary air valve

aerial refueling / air refueling / in-flight refueling (IFR) / air-to-air refueling (AAR)

air combat capable helicopter / air-to-air capable helicopter

air support field pack, field pack air support, airborne / para (air support) / Pathfinder Bergen

amplifying valve

directional-control hydraulic valve

fuel needle valve