ISO 1081:2013

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ISO 1081:2013 is an international standard that defines terms and definitions for V-belts, V-ribbed belts, and their corresponding pulleys. It also specifies the symbols used for these parts. 

ISO 1081:2013 specifies the terms and definitions, in English and French, relating to V-belt drives, V-belts, hexagonal belts, joined V-belts and the corresponding V-grooved pulleys, V-ribbed belt drives, V-ribbed belts and V-ribbed pulleys, as well as the corresponding symbols.