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AS 1101-3:2005, Graphical symbols for welding engineering — Part 3: Welding and non-destructive examination [14] JIS Z 3021:2016, Welding and allied processes — Symbolic representations [15] Gregory E. garuda bet 777 N. hilook pc , Armstrong A A , Welding symbols on drawings, Abington, Cambridge: Woodhead Publishing Limited ISBN 1-85573-589-X