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DIN EN 23742:1991-11

Отменен
Acoustics; determination of sound power levels of noise sources; precision methods for discrete-frequency and narrow-band sources in reverberation rooms (ISO 3742:1988); german version EN 23742:1991 — 11 стр.
ICS
17.140.20 Noise emitted by machines and equipment / Шум от машин и оборудования