| กฎแห่งวัตถุไม่สูญสลาย | [kot haeng watthu mai sūnsalāi] (n, exp) EN: law of conservation of matter FR: loi de conservation de la matière [ f ] |
| conservation of mass | (n) a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system, Syn. law of conservation of mass, conservation of matter, law of conservation of matter |