
【国外标准】 Characteristics & method of test of air conduction hearing aids using electronic amplification
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适用范围:
暂无
标准号:
BS 3171:1959
标准名称:
Characteristics & method of test of air conduction hearing aids using electronic amplification
英文名称:
Characteristics & method of test of air conduction hearing aids using electronic amplification标准状态:
被代替-
发布日期:
1959-11-23 -
实施日期:
出版语种:
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