The control systems inside machines used to be physical: gears and levers and cams.

在过去，机器内部的一整套控制系统是由硬件组成的：传动装置，杠杆和凸轮。

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These impacts and loads are concentrated at a single point or line of contact between follower and cams, as mentioned before.

这些影响和负载都集中在一个点或线的接触追随者和摄像机，如前所述。

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Based on the geometrical relation between tappets and cams, uniform formulas for mutual lift-range transition between flat based tappet, roller (or sphere) tappet and cone tappet were presented.

通过分析不同从动件与凸轮的几何关系，推导出一组平底挺杆、滚子或球面挺杆、尖锥挺杆升程的相互转换通用公式。

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Despite the best efforts of manufacturers, our handsets and pocket cams most often can't compete with the usability or stabilization features of a camcorder.

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"We can continuously observe and record the activity at the summit craters using our Web cams and thermal cameras, which send the images direct to Catania, " Calvari told CNN.

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And in this case, the hybrid model has nothing to do with overhead cams and internal-combustion horsepower but everything to do with using IT-driven insights to get NASCAR fans to buy more tickets and engage more actively with the sport.

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