DB41/T 2074-2020 Specifications for the evaluation of the effectiveness of the construction of a double prevention system for safety production risks and hidden dangers in the communication industry (English Version)
Henan Provincial Standard of the People's Republic of China
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DB41/T 2074-2020
DB41/T 2074-2020 history
2020DB41/T 2074-2020 Specifications for the evaluation of the effectiveness of the construction of a double prevention system for safety production risks and hidden dangers in the communication industry