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  4. Standard "GB 50419-2017"
Standard GB 50419-2017 4.5.2017 preview

GB 50419-2017

Code for design of roadway section and junction of coal mine

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STANDARD published on 4.5.2017


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The information about the standard:

Designation standards: GB 50419-2017
Publication date standards: 4.5.2017
SKU: NS-1178610
Country: Chinese technical standard
Category: Technical standards GB

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