nonexplosive atmosphere

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Nuclear Test-Ban Treaty — an agreement signed by Britain, the Soviet Union, and the U.S. in 1963, committing nations to halt atmospheric tests of nuclear weapons: by the end of 1963, 96 additional nations had signed the treaty. * * * officially Treaty Banning Nuclear… … Universalium
Earth impact hazard — ▪ astronomy Introduction the danger of collision posed by astronomical small bodies whose orbits (orbit) around the Sun carry them near Earth. These objects include the rocky asteroids and their larger fragments and the icy nuclei of comets.… … Universalium
black damp — n a nonexplosive mine gas that is a mixture containing carbon dioxide and is incapable of supporting life or flame compare FIREDAMP * * * choke damp a nonrespirable atmosphere sometimes formed in a mine by the gradual absorption of the oxygen and … Medical dictionary

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