90.93 Standard confirmed May 16, 2023
ISO
ISO/TC 27/SC 1 Coal preparation: Terminology and performance
International Standard
01.080.30 Graphical symbols for use on mechanical engineering and construction drawings, diagrams, plans, maps and in relevant technical product documentation | 73.120 Equipment for processing of minerals
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.
WITHDRAWN
ISO 561:1974
PUBLISHED
ISO 561:1989
90.93
Standard confirmed
May 16, 2023