译：GB/T 4458.5-2003 Mechanical drawings—Indication of tolerances for size and of fits

译：GB/T 6567.5-2003 Graphical symbols for piping systems-Axonometric representation of graphical symbols for piping,piping accessories and valves etc

译：GB/T 4459.2-2003 Mechanical drawings—Conventional representation of gears

译：GB/T 4458.2-2003 Mechanical drawings—Item references and its arrangement for assembling drawings

译：GB/T 4459.4-2003 Mechanical drawings—Conventional reprensentation of springs

译：GB/T 4458.4-2003 Mechanical drawings—Dimensioning