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| the law of indestructibility of matter | |||
| conservation-of-mass theorem; conservation-of-matter theorem | |||
| law of indestructibility of matter; principle of conservation of matter | |||
| law of conservation of matter (The law of conservation of matter was discovered by Lomonosov. — Закон сохранения материи был открыт Ломоносовым.) | |||
| law of matter conservation | |||