Actinometers; Aerometers; Altimeters; Ammeters; AC/DC converters; Acid hydrometers; Acidity meters; Acoustic alarms; Acoustic meters; Adjustable magnetic mounts for PC tablets; Aerials for wireless communications apparatus; Ampere-hour meters; Amplifier stands; Angle gauges; Angle viewfinder; Anti-dazzle spectacles; Anti-fogging safety goggles; Antifreeze testers; Apparatus for analysing gases; Audio analyzers