China 'SJ 20125-1992
' standard english version summary:
SJ
中华人民共和国行业标准
INDUSTRY STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
SJ 20125-1992
General specifications for anti-noise head set, receiver set and earpieces 头戴式抗噪声送受话器组、受话器组和耳罩总规范
Issued Date:
Implemented Date:
Issued by:
The Standardization Administration of the People's Republic of China
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"SJ 20125-1992" standard !
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General specifications for anti-noise head set, receiver set and earpieces
GB Standard Chinese Title
头戴式抗噪声送受话器组、受话器组和耳罩总规范
Chinese
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