Light inductor helps Intellectual machine to check the paper, no paper no working and vice versa while it also can lessen knife abrasion and correct cutting.

感应型设有光感检测纸张，有纸工作，减少刀片的磨损，也使裁切更准确。

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This paper briefly analyzes the working principle of fluoroscopy of C-arm, describes its analysis and troubleshooting process of no image display.

简要分析了C型臂机透视工作原理，介绍了曝光正常但无图像显示故障的分析和排除过程。

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This paper introduced the construction and working principle of Single-cylinder Electric Power Confined Piston Engine, and studied the No-load characteristic on theory and experiment.

本文介绍了单缸电力约束活塞发动机的结构及工作机理，并对其空载特性进行了理论和试验研究。

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Scottish government officials are currently working on a pensions paper, but there are no details of when it will be published.

BBC: Scotland politics

Indeed, mutual funds that used options for either speculation or hedging from July 2003 to June 2007 showed no sign of market-beating returns after adjusting for risk, according to a working paper by Gjergji Cici, an assistant professor at the College of William and Mary.

WSJ: Upside: Options for Nervous Investors