HB 6881-1993 Computing graphic regulations

GB/T 131-1993 Mechanical drawings—Surface roughness symbols and methods of indicating GB/T 131-2006 Geometrical Product Specifications (GPS)—Indication of Surface texture in technical Product documentation GB/T 4457.2-2003 Technical drawing—Drawing presentation-General principles of leader lines and reference lines GB/T 4457.4-2002 Mechanical drawings—General principles of presentation-Lines GB/T 4457.5-2013 Mechanical drawings—Basic conventions for representing areas on cuts and sections GB/T 4457.5-1984 Mechanical drawings--Symbols for sections GB/T 4458.1-2002 Mechanical drawings—General principles of presentation-Views GB/T 4458.2-2003 Mechanical drawings—Item references and its arrangement for assembling drawings GB/T 4458.3-2013 Mechanical drawings—Axonometric drawings GB/T 4458.3-1984 Mechanical drawings--Axonometric drawings GB/T 4458.4-2003 Mechanical drawings—Dimensioning GB/T 4458.5-2003 Mechanical drawings—Indication of tolerances for size and of fits GB/T 4458.6-2002 Mechnical drawings—General principles of presentation—Sections GB/T 4459.1-1995 Mechanical drawings—Representation of screw threads and threaded parts GB/T 4459.2-2003 Mechanical drawings—Conventional representation of gears GB/T 4459.3-2000 Mechanical drawings—Representation of splines GB/T 4459.4-2003 Mechanical drawings—Conventional reprensentation of springs GB/T 4459.5-1999 Mechanical drawings—Representation of centre holes GB/T 4459.6-1996 Mechanical drawings—Representation of seals for dynamic application GB/T 4459.7-1998 Mechanical drawings—Representation of rolling bearings GB/T 4459.7-2017 Technical drawings—The detailed simplified representation of rolling bearings GB/T 4459.8-2009 Mechanical drawings—Seals for dynamic application—Part 1:General simplified representation GB/T 4459.9-2009 Mechanical drawings—Seals for dynamic application—Part 2:Detailed simplified representation GB/T 4460-2013 Mechanical drawings—Graphical symbols for kinematic diagrams HB 5859.1 HB 6189-1989 Simplified Regulations for Aircraft Designs GB/Z 131-2025 Sharing economy—General trustworthiness and safety requirements for digital platform