| 单词 | barometric draft regulator |
| 释义 | barometric draft regulator [bar·ǝ`met·rik `draft reg·yǝ`lād·ǝr] MECHANICAL ENGINEERING A damper usually installed in the breeching between a boiler and chimney; permits air to enter the breeching automatically as required, to maintain a constant overfire draft in the combustion chamber. |
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