The symbols have been selected in accordance with the following principles: a) the plants should be widely used; b) the symbols should be easy to draw and readily be distinguishable one from another; c) the principle and not the appearance of any particular type of machine should be represented, d) where a single symbol represents a group of items for which separate symbols are s-tandardized nationally, the ISO symbol should be readily distinguishable from any one of the national symbols.
Status: PublishedPublication date: 1989-12
Corrected version (en): 1992-07
Corrected version (fr): 1992-07Stage: International Standard confirmed [90.93]
Edition: 2Number of pages: 13
Technical Committee :ISO/TC 27/SC 1
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