This paper analysed the working principal of SSR and described its main use in chemical-fibre industry.

主要介绍固态继电器的工作原理及其在化纤工业中的应用，并就使用中的注意事项作了说明。

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The first one analyzed composing and working principal about low speed control system of principal axis.

第一部分，对主轴低速控制系统的构成及工作原理进行分析。

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The chief working principal, modeling methods, influencing factors, and metrology means are investigated to reveal the fundamental focus.

阐述了基本作用原理、影响建模分析的因素和测试验证的方法。指出了各自的关键技术及研究焦点。

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Workers living outside a principal city and working in a principal city show the highest rates of long commutes, at 12.5%, the report shows.

FORBES: The Cities With The Most Extreme Commutes

After emailing Department of Education officials over the past week, calling 311 and working with the principal of the Brooklyn School of Inquiry, Ms. Gorelik found out Friday that Kevin's newly adjusted score put him in the 97th percentile.

WSJ: Testing Firm Is Under Fire Due to Errors Scoring School Exams

The IETF approval "tells the world that IPP is to be taken seriously, " says Carl-Uno Manros, chair of the IPP working group and a principal engineer with Xerox.

CNN: Technology - Engineers approve standardization of Internet Printing Protocol