The use of PE line in TN system and TT system is analyzed, and the characteristics of lighting return circuit in residence and the advantages of adding PE line are discussed.

对PE线在TN系统与TT系统中的作用进行了分析，讨论了住宅内照明回路的特点及增加PE线后的优点。

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The principle, method and relative influence factors of the trace line of PE pipe are introduced.

介绍了PE管示踪线的探测原理和方法及相关影响因素。

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The line produces single-wall corrugated pipe made for PVC or PE material. It is made up twin(single)-screw extrude, forming machine, reeling machine and so on.

该生产线用于生产PVC、PE原料的单壁波纹管，主要由双（单）螺杆挤出机、成型机、收卷机等主设备组成。

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The bottom line: PE should be seen in relation to the level and the direction of interest rates rather than in relation to its historical level.

FORBES: Is a Low PE a False Buying Signal for US Stocks?

The orange line plots earnings, the dark blue line shows the historical normal PE ratio applied by the market, and the light blue shaded area reflect dividends paid out of earnings.

FORBES: Target Corp Offers Solid Value And An Above Market Yield