GB/T 30731-2014 Specifications of combined equipment for coal sample preparation

GB/T 191-2000 Packaging—Pictorial marking for handling of goods GB/T 191-2008 Packaging—Pictorial marking for handling of goods GB/T 307.3-1996 Rolling bearings—General technical regulations GB/T 307.3-2005 Rolling bearings—General technical regulations GB/T 307.3-2017 Rolling bearings—General technical regulations GB 474-1996 Preparation of coal sample GB/T 474-2008 Method for preparation of coal sample GB/T 524-2003 Flat transmission belt GB/T 524-2007 Flat transmission belt GB/T 700-1988 Carbon structural steels GB/T 700-2006 Carbon structural steels GB 755-2000 Rotating electrical machines—Rating and performance GB/T 755-2008 Rotating electrical machines—Rating and performance GB/T 755-2019 Rotating electrical machines—Rating and performance GB/T 755.2-2003 Methods for determining losses and efficiency of rotating electrical machinery from tests(excluding machines for traction vehicles) GB/T 985.1-2008 Recommended joint preparation for gas welding,manual metal arc welding,gas-shield arc welding and beam welding GB/T 1840-1989 Modules of cylindrical gear with circular arc profiles GB/T 2828.1-2003 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 2828.1-2012 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 3768-1996 Acoustics—Determination of sound power levels of noise sources using sound pressure—Survey method using an enveloping measurement surface over a reflecting plane GB/T 3768-2017 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Survey method using an enveloping measurement surface over a reflecting plane GB/T 10613-2003 Industrial plate screens-Thickness of 3mm and above—Round and Square holes GB/T 11544-1997 Classical and narrow V-belts—Dimensions GB/T 11544-2012 Belt drives—Classical and narrow V-belts—Dimensions(system based on datum width) GB/T 13306-1991 Plates GB/T 13306-2011 Plates GB/T 13384-1992 General specifications for packagings of mechanical and electrical products GB/T 13384-2008 General specifications for packing of mechanical and electrical product GB/T 15479-1995 Technical requirements and test methods of insulation resistance and insulating strength for use in industrial process measurement and control instruments GB/T 19494.2-2004 Mechanical sampling of coal—Part 2:Method for sample preparation GB/T 19494.2-2023 Mechanical sampling of coal—Part 2:Method for sample preparation GB/T 19494.3-2004 Mechanical sampling of coal—Part 3:Determination of precision and bias test GB/T 19494.3-2023 Mechanical sampling of coal—Part 3:Determination of precision and bias test GB/T 19867.1-2005 Welding procedure specification for arc welding JB/T 5945-2018 Engineering machinery assembly general technical specifications JB/T 5945-1991 Engineering machinery assembly general technical specifications JB/T 9050.1-2015 Cylindrical Gear Reducer Part 1: General Technical Conditions JB/T 9050.1-1999 General technical specification for cylindrical gear reducer JB/T 9050.1-1999 GB/T 755-2025 Rotating electrical machines—Rating and performance GB/T 191-2025 Graphical symbols marking for handling and storage of packages