LST ISO 128-22:2003 Technical drawings. General principles of presentation. Part 22: Basic conventions and applications for leader lines and reference lines (idt ISO 128-22:1999)
2020LST EN ISO 128-2:2020 Technical product documentation (TPD) - General principles of representation - Part 2: Basic conventions for lines (ISO 128-2:2020)
2003LST ISO 128-22:2003 Technical drawings. General principles of presentation. Part 22: Basic conventions and applications for leader lines and reference lines (idt ISO 128-22:1999)
2002LST EN ISO 128-20:2002 Technical drawings - General principles of presentation - Part 20: Basic conventions for lines (ISO 128-20:1996)