waterproof air-cooled engine

Vee-form air-cooled engine

water-cooled engine

directly cooled engine

air-cooled

liquid-fuel air-cooled rocket

engine capacity / engine power, engine output

roll-fed waterproof paper

Bergen waterproof liners

MVP Lightweight Waterproof Jacket

MVP Lightweight Waterproof Trousers

waterproof grease

waterproof lubricating grease

waterproof sheet

waterproof

liquid-cooled

water-cooled reactor (WCR)

water-cooled

water-cooled undergarment

gas-cooled heavy water-moderated reactor

reaction engine / motor (jet engine)

rotary engine (Wankel engine)

engine ground run / engine test

engine oil reservoir / engine oil tank

airbreathing jet engine / ducted jet engine

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

air-breathing jet engine

engine air intake tube

air engine

air-stream engine

diesel engine with air cell