NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 7957-2017
General requirements for construction，performance and explosion protected testing of caplights for use in mines susceptible to firedamp 瓦斯环境用矿灯结构、性能和防爆试验通用要求
Issued Date:2017
Implemented Date:2017
Issued by:
The Standardization Administration of the People's Republic of China
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