
【国外标准】 Specification. An artificial ear for the calibration of earphones of the external type
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适用范围:
暂无
标准号:
BS 2042:1953
标准名称:
Specification. An artificial ear for the calibration of earphones of the external type
英文名称:
Specification. An artificial ear for the calibration of earphones of the external type标准状态:
被代替-
发布日期:
1954-01-13 -
实施日期:
出版语种:
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