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ISO 26909:2009 specifies terms and definitions commonly used in the metal springs industry. Specifically, these terms appear in technical product documentation. Heat-treatment and surface-treatment terms pertinent to springs are included.

Terms in ISO 26909:2009 are grouped into the following seven categories:

a) general features of springs;

b) application of springs in machinery and engineering;

c) layouts and nomenclature of springs;

d) specification requirements;

e) design and calculation;

f) manufacturing and processing;

g) testing and inspection.