Electrical, electromechanical, electrochemical, electrophysical measuring equipment for non-electric values

3806001 Strain gauges
3806003 Pulse counters and recorders, electrical
3806006 Tachometers and tachographs, electrical
3806007 Tachometers, electronic
3806009 Tachometer couplings
3806010 Noise average meters, audio, for industrial use
3806012 Measuring instruments, solution concentration, electric or electronic
3806020 Measuring equipment, laser and maser output
3806021 Measuring equipment, laser output, optical
3806022 Laser velocity meters
3806025 Standard atomic frequency meters