| 释义 |
回火huí∥huǒ
1.把淬火后的工件加热(不超过临界温度),然后冷却,使能保持一定的硬度,增加韧性。{tempering; impart strength and toughness to a metal workpiece by heating it (to below its critical temperature) and cooling itagain;}也叫also配火{pèihuǒ}。
2.氧炔吹管等的火焰向反方向燃烧。{(of flame from oxyacetylene blowpipe) flareback burn in the opposite direction} |