DIN 45635-50:1987-08 Measurement of noise emitted by machines; airborne noise measurement, enveloping surface method; valves

标准编号：DIN 45635-50:1987-08

英文标题：Measurement of noise emitted by machines; airborne noise measurement, enveloping surface method; valves

德文标题：Geräuschmessung an Maschinen; Luftschallemission, Hüllflächen-Verfahren; Armaturen

发布日期：1987-08

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