IS 2032 : Part 9 : 1969 Graphical symbols used in electrotechnology: Part 9 Electron tubes (other than microwave tubes)
| UDC 003.62 : 621.382 | LTD 4 |
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| Reaffirmed 2016 |
1. Scope
1.1 This standard ( Part iX) coven graphical symbols for electron tubes other than microwave tubes.