GB/T 20803-2006 Universal technical criterions for proportion system in feed mill

GB/T 3797-2005 Electrical control assemblies JJG 648-1996 Discontinuous Totalizing Automatic Weighing Instruments(Totalizing Hopper Weighers) JJG 1001-1998 国际计量基本词汇与通用术语(VIM 1993年版) 法制计量词汇(1978年版) GB 2893-2001 Safety colors GB 2893-2008 Safety colours GB/T 2893.1-2004 Graphical symbols—Safety Colors and safety signs—Part1:Design principles for safety signs in workplaces and public areas GB/T 2893.1-2013 Graphical symbols—Safety colours and safety signs—Part 1:Design principles for safetry signs and safety markings GB/T 2893.2-2008 Graphical symbols—Safety colours and safety signs—Part 2:Design principles for product safety labels GB/T 2893.2-2020 Graphical symbols—Safety colours and safety signs—Part 2:Design principles for product safety labels GB/T 2893.3-2010 Graphical symbols—Safety colours and safety signs—Part 3:Design principles for graphical symbols for use in safety signs GB/T 2893.4-2013 Graphical symbols—Safety colours and safety signs—Part 4:Colorimetric and photometric properties of safety sign materials GB/T 2893.5-2020 Graphical symbols—Safety colours and safety signs—Part 5:Principles and requirements for the use of safety signs 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 6921-1986 Determination of the concentration of airborne particulate matters GB/T 7551-1997 Load cells GB/T 7551-2008 Load cells GB/T 7724-1999 Weighting indication controller GB/T 7724-2008 Electronic Weighing Meter GB/T 7724-2023 Electronic weighing indicator GB 14249.1-1993 Safety requirements for electronic weighing instruments