Descriptors | Designations, Flames, 2nd family gases, Safety devices, Watertightness tests, Ignition systems (heat engineering), Gas-powered devices, Abrasion, Temperature control, Automatic control systems, Heat, Gas flow, Air heaters, Air, Flow rates, Convection heaters, Performance testing, Combustion, Combustion products, Marking, Artificial weathering tests, Test equipment, Heaters, Design, Safety engineering, Instructions for use, Weather resistance, Industrial facilities, Gas valves, Safety valves, Scratch tests, Business facilities, Warm-air heating, Gas space heating, Burners, Classification systems, Performance |