China National Standards

China timbering GB Standards List


  •  China "timbering" GB Standards List:
  • Standard  Code Standard Title Standard Class Order
    GB/T 4697-2017 Hot rolled steel section for mine timbering
    矿山巷道支护用热轧型钢
    China National Standards
    timbering

    English PDF
    GB/T 4697-2008 Hot-rolled U-type steel for mine timbering
    矿山巷道支护用热轧U型钢
    China National Standards
    timbering

    English PDF

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