| 单词 | aerator |
| 释义 | aerator [`e´rād·ǝr] DESIGN ENGINEERING A tool having a roller equipped with hollow fins; used to remove cores of soil from turf. ENGINEERING 1. One who aerates. 2. Equipment used for aeration. 3. Any device for supplying air or gas under pressure, as for fumigating, welding, or ventilating. MECHANICAL ENGINEERING Equipment used to inject compressed air into sewage in the treatment process. METALLURGY A device which decreases the density of sand by mixing it with air, thus facilitating the movement of sand particles in packing. |
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