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| level mark, datum line | |||
| null position | |||
| home; nought state; zero-access state | |||
| zero level (of the oscillation) | |||
| zero position; initial position | |||
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Nullage : 3 phrases, 3 sujets |
| Instruments de mesure | 1 |
| Métallurgie | 1 |
| Optique branche de la physique | 1 |