tachometers, speed meters, accelerometers, pressure meters, photometers, luminoflux meters, illuminometers, refactometers, hygrometers, calorimeters, flometers, level gauges, level sensors, densimeters, concetration emters, gravimeters, viscosimeters,vibration gauges, dynamometers, ships logs, gauge comparators,interferometers, angle dividing machines, calibration checking instruments, clinometers, angle gauges, pressure automation control machines and instruments, vacuum automatic control machines and instruments, vacuum automatic control machines and instruments, liquid level automatic control machines and instruments, fluid composition automation control machines and instruments automatic combustion control machines and instruments, program controlling machines and instruments, hydrophones, applied ultra-sonic echo sounders, applied electronic computers, thermometers, planimeters, gas meters, water meters, level indicators, remote control and telemetering apparatus, distance measuring instruments, capacity measures, detectors, electrical circuit testers, oscillographs, recorders,indicators and other photographic, cineamtographic, optical, weighing, measuring, signaling, checking apparatus and instruments
Electrical and Scientific Apparatus