| 释义 |
valve-in-head engine AHD[vălvʹĭn-hĕdʹ] D.J.[ˈvælvɪnˈhed]K.K.[ˈvælvɪnˈhɛd]n.（名词）- An internal-combustion engine, as in some automobiles, that has the inlet and exhaust valves in the cylinder head instead of in the engine block.顶置气门发动机：一种内燃机，如用于汽车上的内燃机，在汽缸顶部而非发动机内部装有进给阀和排气阀
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