This standard was last reviewed and confirmed* in 2015.
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.
Document published on: 1989-11 Edition: 2 (Monolingual) ICS: 01.080.30; 73.120 Status: Published Stage: 90.93 (2015-10-06) TC/SC: ISO/TC 27/SC 1 Number of Pages: 13
Revises: ISO 561:1974
No corrigenda or amendments available