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| chemical transformation | |||
| contamination | |||
| chemical alteration | |||
| chemical change | |||
| химическое изменение: 12 phrases in 8 subjects |
| Makarov | 4 |
| Nanotechnology | 1 |
| Oil / petroleum | 1 |
| Oil and gas | 1 |
| Optics branch of physics | 1 |
| Quality control and standards | 1 |
| Technology | 2 |
| Welding | 1 |