RION
ELECTRO-ACOUSTIC TRANSDUCERS, MICROPHONES [ AND PIEZO-ELECTRIC GAS IGNITORS; ] MEASURING, RECORDING AND TESTING INSTRUMENTS-NAMELY, SOUND OR NOISE LEVEL METERS, SOUND OR NOISE FREQUENCY ANALYSERS, SOUND OR NOISE LEVEL RECORDERS, SOUND SPECTROGRAPHS, AUDIOMETERS, [ AUDIOMETRIC TEST ROOMS, HEARING AID TESTERS, ] ACOUSTICALLY CALIBRATED SOUND SOURCE APPARATUSES, [ NYSTAGMOGRAPHS, ] VIBRATION METERS, MEASURING INSTRUMENTS RELATING TO ENGINES-NAMELY, [ TACHOMETERS AND KNOCKMETERS, ] VISCOSIMETERS,...
Registered · July 22, 1982 · 73375969 ·