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| |||
| primary radiator | |||
| aerial feed; antenna feed | |||
| |||
| primary sources (Published and unpublished records without secondary interpretation or commentary) | |||
| original sources; primary literature | |||
| source primaire: 8 phrases in 4 subjects |
| Communications | 3 |
| Earth sciences | 2 |
| Energy industry | 2 |
| Finances | 1 |
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