[ Abacuses; Accelerometers; Ammeters; Anemometers; Chronographs for use as specialized time recording apparatuses; Densimeters; ] Distance measuring apparatus; [ Dynamometers; Egg timers; Electric light dimmers; Electronic agendas; Frequency converters; Frequency meters; Galvanometers; Gasometers; Hourglasses; ] Instruments for measuring length; Lasers for measuring purposes; Measuring rules; [ Optical frequency metrology devices; Parking meters; Radioactivity measuring apparatus; Resistance ...