GB/T 7957-2017
China national
standard english version:
GB
中华人民共和国国家标准
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