GB 25974.1-2026 Powered support for coal mine—Part 1:General technical specification

GB 25974.4-2026 Powered support for coal mine—Part 4:Specification for electro-hydraulic control system

GB 25974.1-2010 Powered support for coal mine—Part 1:General specification

GB/T 228.1-2021 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 229-2020 Metallic materials—Charpy pendulum impact test method GB/T 3836.1-2021 Explosive atmospheres—Part 1:Equipment—General requirements GB/T 9969-2008 General principles for preparation of instructions for use of industrial products GB 9969.1-1998 General principles for preparation of instructions for use of industrial products GB/T 11352-1989 Carbon steel castings for general engineering purposes GB/T 11352-2009 Carbon steel castings for general engineering purpose GB/T 12361-2003 General specification of Steel die forgings GB/T 12361-2016 Steel die forgings—General specification GB/T 12467.1-1998 Quality requirements for welding—Fusion welding of metallic materials—Part 1:Guidelines for selection and use GB/T 12467.1-2009 Quality requirements for fusion welding of metallic materials—Part 1:Criteria for the selection of the appropriate level of quality requirements GB/T 12467.2-1998 Quality requirements for welding—Fusion welding of metallic materials—Part 2:Comprehensive quality requirements GB/T 12467.2-2009 Quality requirements for fusion welding of metallic materials—Part 2:Comprehensive quality requirements GB/T 12467.3-1998 Quality requirements for welding—Fusion welding of metallic materials—Part 3:Standards quality requirements GB/T 12467.3-2009 Quality requirements for fusion welding of metallic materials—Part 3:Standard quality requirements GB/T 12467.4-1998 Quality requirements for welding—Fusion welding of metallic materials—Part 4:Elementary quality requirements GB/T 12467.4-2009 Quality requirements for fusion welding of metallic materials—Part 4:Elementary quality requirements GB/T 12467.5-2009 Quality requirements for fusion welding of metallic materials—Part 5:Standard documents need to conform to claim conformity to the quality requirements GB/T 13264-2008 Sampling procedures and tables for small lot inspection by attributes for percent nonconforming items GB/T 25974.2-2010 Powered support for coal mine—Part 2:Specification for power set legs and rams GB/T 25974.3-2010 Powered support for coal mine—Part 3:The hydraulic control system and valves MT 76-2002 Emulsifying oil, concentrates, and high water content hydraulic fluids for hydraulic supports (poles) MT/T 76-2011 Emulsifying oil,concentrate fluid and high-water content hydraulic fluid used for powered support MT/T 98-2006 Testing specification for hydraulic support hoses and hose assemblies MT/T 1273-2025 Manufacturing technical specification for structural parts of powered support MT/T 986-2006 Mining U-shaped quick connector and accessories