The principle of cam testing with single gauge head and double gauge heads is analyzed and the measurment method with single gauge head in engineering practice is determined.

本文通过对单测头与双测头的原理进行比较分析，确定了在实际应用中使用单测头进行测量的方案。

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Unlike other company rankings that use a single metric (generally revenue), Forbes works diligently to take a holistic gauge of the growth prospects for young, privately held firms.

FORBES: Last Chance To Nominate For Forbes' List Of America's Most Promising Companies