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 China 'GB/T 7957-2017 ' standard english version summary:

 

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

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Issued by:   The Standardization Administration of the People's Republic of China
 
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GB Standard Code GB/T 7957-2017
Standard Category China National Standards
GB Standard English Title General requirements for construction,performance and explosion protected testing of caplights for use in mines susceptible to firedamp
GB Standard Chinese Title 瓦斯环境用矿灯结构、性能和防爆试验通用要求
Chinese Version Price $15 USD per 50 pages
English Translation Fee About $15  per 1 page (1,000 words)
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