ISO-561 › Coal preparation plant -- Graphical symbols
ISO-561
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2ND EDITION
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CURRENT
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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.
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Document Number
ISO 561:1989
Revision Level
2ND EDITION
Status
Current
Publication Date
Dec. 1, 1989
Committee Number
ISO TC 27/SC 1