overhead cam shaft [机] 上凸轮轴
overhead-cam 顶置凸轮
Double Overhead Cam 双顶置式凸轮轴
dual overhead cam 双顶置式凸轮轴
dual-overhead-cam 双凸轮轴
overhead cam engine 顶置凸轮轴式发动机
DOHC double-overhead-cam 顶置双凸轮
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With the valve cover tilted up you can see the single overhead CAM shaft and valves.
与阀盖倾斜了，您可以看到单一的架空凸轮轴和阀门。
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The camshaft also fits inside the block, except on overhead-cam engines (OHC).
除了顶置凸轮（OHC）发动机以外，凸轮轴都安装在气缸体里面。
Yet the Hemi, built in low-wage Mexico, costs 5% to 10% less to manufacture than a modern dual overhead cam V8.
FORBES: The Engine That Could
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