DB37/T 2853-2016 Specification for safety inspection and inspection of in-service personnel positioning system in metal and nonmetal underground mines (English Version)
Shandong Provincial Standard of the People's Republic of China
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DB37/T 2853-2016
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2016DB37/T 2853-2016 Specification for safety inspection and inspection of in-service personnel positioning system in metal and nonmetal underground mines