This paper makes an analysis and research on the reliability of the printing circuit board design, based on its rational demands and the practice and reality of electron product design.

从电子产品设计的实用性出发，根据印刷线路板设计的合理性要求，对印刷线路板设计的可靠性进行分析和研究。

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Automation Optical inspection (AOI) on printed circuit board assembly is an important research field in the electron industry product inspection.

电路板板载元器件自动光学检测是电子行业产品检测领域一个重要的研究课题。

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Shenzhen Huaxing electron sold to be established in 2000, was one is engaged in the numerical code, the board card research and development, the production and the sales carrier provider.

深圳市源生鑫电子经营部成立于2000年，是一家从事数码，板卡研发、生产和销售的营运商。

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We can make some substitutions here using some of the derivation on the previous board which will give us the Planck constant divided by 2 pi mass of the electron times the Bohr radius.

在这里我们也可以,用我以前在黑板上写过的一些词来取代它,得到的是普朗克常数除以2π电子质量,再乘以波尔半径。

麻省理工公开课 - 固态化学导论课程节选