Refers to sources of confusion, and gives a conversion table for grades. (1000 w.)
Units for indicating grades
St Ry Jour
1903
Article (Journal)
English
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DIRECTION INDICATING DEVICE AND DIRECTION INDICATING METHOD
European Patent Office | 2024
|DIRECTION INDICATING DEVICE AND DIRECTION INDICATING METHOD
European Patent Office | 2024
|Engineering Index Backfile | 1909
|Engineering Index Backfile | 1900
|