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【国外标准】 Hearing protectors - Part 4: Measurement of effective sound pressure levels for level-dependent sound-restoration ear-muffs (ISO/TR 4869-4:1998); English version DIN EN ISO 4869-4
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2025-06-05
- DIN EN ISO 4869-4
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标准简介适用范围：
暂无
标准号：
DIN EN ISO 4869-4
标准名称：
Hearing protectors - Part 4: Measurement of effective sound pressure levels for level-dependent sound-restoration ear-muffs (ISO/TR 4869-4:1998); English version DIN EN ISO 4869-4
英文名称：
标准状态：
废止-
发布日期：
2001-10-01 -
实施日期：
出版语种：
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