A space empty of air, esp. one from which the air has been artificially withdrawn.
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| 单词 | θ75321 |
| 释义 | the world > matter > gas > air > [noun] > air-pressure > vacuum (8) vacuum1652 A space empty of air, esp. one from which the air has been artificially withdrawn. Subcategories:— above mercury in barometer (1) — creating (1) — chamber (2) — action of packing in (3) |
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