Acoustics—Noise emitted by machinery and equipment—Measurement of emission sound pressure levels at a work station and at other specified positions—Engineering method in an essentially free field over a reflecting plane
NORMA vydaná dňa 8.3.1999
Designation standards: GB/T 17248.2-1999
Note: NEPLATNÁ
Publication date standards: 8.3.1999
Country: Chinese technical standard
Kategória: Technické normy GB