Electroacoustics. Simulators of human head and ear. Part 5. 2 cm3 coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts
State system for ensuring the uniformity of measurements. Standard reference data. Chlorine, liquid and gaseous. Density at temperatures from 172,17 K to 440 K and pressures up to 20 Mpa
€10
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