MT 324-1993 Double-pillar parallel hydraulic top-cutting props

MT 119 MT 177 MT 178 MT 179 GB/T 197-2003 General purpose metric screw threads—Tolerances GB/T 197-2018 General purpose metric screw threads—Tolerances GB/T 1184-1996 Geometrical tolerancing—Geometrical tolerance for features without individual tolerance indications GB/T 1804-2000 General tolerances for linear and angular dimensions without individual tolerance indications GB/T 2649-1989 Methods of sampling for mechanical properties tests of welded joint GB/T 2650-1989 Method of impact test for welded joint GB/T 2650-2008 Impact test methods on welded joints GB/T 2650-2022 Destructive tests on welds in metallic materials—Impact tests GB/T 2651-1989 Method of tensile test for welded joint GB/T 2651-2008 Tensile test method on welded joints GB/T 2651-2023 Destructive tests on welds in metallic materials—Transverse tensile test GB/T 2652-1989 Method of tensile tests for weld and deposited metal GB/T 2652-2008 Tensile test methods on weld and deposited metal GB/T 2652-2022 Destructive tests on welds in metallic materials—Longitudinal tensile test on weld metal in fusion welded joints GB/T 2653-1989 Methods of bend and compression tests for welded joint GB/T 2653-2008 Bend test methods on welded joints GB 3452.1-1992 Fluid systems—Sealing devices—O-rings—Inside diameters, cross-sections, tolerances and size identification code GB/T 3452.1-2005 Fluid power systems—O-rings—Part 1:Inside diameters, cross-sections, tolerances and size identification code GB/T 3452.3-2005 Housing dimensions for O-ring elastomer seals in hydraulic and pneumatic applications GB/T 11352-1989 Carbon steel castings for general engineering purposes GB/T 11352-2009 Carbon steel castings for general engineering purpose GB/T 13306-1991 Plates GB/T 13306-2011 Plates MT/T 94-1996 Hydraulic support column, jack inner diameter and piston rod outer diameter series MT 313-1992 Hydraulic support column technical specification MT 97-1992 Hydraulic support jack technical specification MT 112-1993 Mining single-stage hydraulic post JB/T 3338-2013 JB/T 3338-2013 Hydraulic Components Cylindrical Helical Compression Spring Technical Specification JB/T 5943-2018 Engineering Machinery Welding Components General Technical Specification MT/T 98-2006 Testing specification for hydraulic support hoses and hose assemblies MT/T 112.1-2006 Mining single-unit hydraulic pillar Part 1: General requirements JB/T 3338.1-1993 JB/T 3338.1-1993 - Technical Specification for Cylindrical Helical Compression Spring for Hydraulic Components JB/T 3338.2-1993 JB/T 3338.2-1993 Design and calculation of cylindrical spiral compression springs for hydraulic components MT 76-2002 Emulsifying oil, concentrates, and high water content hydraulic fluids for hydraulic supports (poles) JB/T 5943-1991 General technical specification for welding parts of construction machinery MT/T 76-2011 Emulsifying oil,concentrate fluid and high-water content hydraulic fluid used for powered support