sodium line
| reversal method
| sodium line abbr. | |
| phys. | Natriumlinie |
| reversal method abbr. | |
| automat. | Inversionsmethode |
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| Natriumlinie f | |||
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sodium line : 4 phrases in 2 subjects |
| Optics branch of physics | 3 |
| Technology | 1 |