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| chemical law (Chemical laws are those laws of nature relevant to chemistry. The most fundamental concept in chemistry is the law of conservation of mass, which states that ... WK Alexander Demidov) | |||
| химический закон: 11 do fraz, 7 tematyki |
| Ekologia | 1 |
| Makarowa | 3 |
| Pospolicie | 2 |
| Przemysł chemiczny | 1 |
| Przemysł energetyczny | 1 |
| Technika i technologia | 2 |
| Wojskowość | 1 |