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| oxygen content | |||
| oxygen content | |||
| oxygen content Amount of oxygen contained in a solution | |||
| oxygen balance | |||
| oxygen content (of soil air); O₂ content (of soil air); oxygen percentage (of soil air) | |||
| oxygen concentration | |||
| Sauerstoffgehalt: 9 phrases in 4 subjects |
| Automobiles | 1 |
| Chemistry | 1 |
| Environment | 2 |
| General | 5 |