NB/T 11520-2024 Stepping self-moving device for scraper transfer machine in underground coal mines

GB/T 191-2000 Packaging—Pictorial marking for handling of goods GB/T 191-2008 Packaging—Pictorial marking for handling of goods GB/T 3683-1992 Rubber hoses and hose assemblies—Wire reinforced hydraulic type GB/T 3683.1-2006 Rubber hoses and hose assemblies—Wire-braid-reinforced hydraulic types—Specification—Part 1:Oil-based fluid applications GB/T 3683-2011 Rubber hoses and hose assemblies—Wire-braid-reinforced hydraulic types for oil-based or water-based fluids—Specification GB/T 3683-2023 Rubber hoses and hose assemblies—Wire-braid-reinforced hydraulic types for oil-based or water-based fluids—Specification GB 3836.1-2000 Electrical apparatus for explosive gas atmospheres—Part 1:General requirements GB 3836.1-2010 Explosive atmospheres—Part 1:Equipment—General requirements GB/T 3836.1-2021 Explosive atmospheres—Part 1:Equipment—General requirements GB 3836.2-2000 Electrical apparatus for explosive gas atmospheres—Part 2:Flameproof enclosure “d” GB 3836.2-2010 Explosive atmospheres—Part 2:Equipment protection by flameproof enclosures "d" GB/T 3836.2-2021 Explosive atmospheres—Part 2:Equipment protection by flameproof enclosures “d” GB 3836.4-2000 Electrical apparatus for explosive gas atmospheres—Part 4:Intrinsic safety“i” GB 3836.4-2010 Explosive atmospheres—Part 4:Equipment protection by intrinsic safety "i" GB/T 3836.4-2021 Explosive atmospheres—art 4:Equipment protection by intrinsic safety “i” GB/T 13306-1991 Plates GB/T 13306-2011 Plates 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 GB/T 37400.3-2019 Heavy mechanical general technical specification—Part 3:Welding parts AQ 1043-2007 Mining Product Safety Mark Identification 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 154.1-1992 The guidelines for the preparation of coal mine electromechanical product models and management measures MT/T 154.1-2011 Coal mine electromechanical product model designation method Part 1: Guidelines MT 209-1990 The general technical requirements for electrical products used in coal mine communication, detection, and control MT 210-1990 The basic test methods for electrical products used in coal mine communication, detection, and control MT/T 986-2006 Mining U-shaped quick connector and accessories GB/T 191-2025 Graphical symbols marking for handling and storage of packages