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Photovoltaic Cells and Arrays

光伏或太阳能电池是光伏系统的基本构建块。几个单元组成一个模块，几个模块构成了一个数组。本文解释了为什么需要阵列来产生足够数量的电力。

从National Renewable Energy Laboratory 2002年1月4日

光伏：简短的历史

This article briefly looks at where photovoltaics came from. From its discovery, to use in spacecraft, semiconductors and renewed interest as an alternative energy source.

从National Renewable Energy Laboratory 2002年1月4日

光伏（PV） - 它们如何工作

This article discusses photovaltaics (PV) and how they work.

2002年1月4日

不锈钢 - 钢筋的ISO尺寸公差

This table overviews ISO tolerances for stainless steel bar stock and includes examples.

2002年1月4日

Stainless Steel - Approximate Hardness Conversions for Austenitic Stainless Steels

该表提供了用于奥氏体不锈钢的钢丝，Vickers，Rockwell B和Rockwell C尺度的硬度值的近似转换。

2002年1月4日

This article directly compares physical properties of most grades of stainless steels in the annealed state. Properties included are density, elastic modulus, thermal expansion and conductivity, specific heat and electrical resistivity.

2002年1月4日

不锈钢级成分，用于铁素体，双工，马氏体和降水硬化不锈钢

This article briefly outlines the chemical compositions and main applications for ferritic, duplex, martensitic and precipitation hardening grades of stainless steels.

2002年1月2日

Stainless Steel Grade Compositions for Austenitic Stainless

This article briefly outlines the chemical compositions and main applications for austenitic grades of stainless steel.

2002年1月2日

Stainless Steel Grade Selection Guidelines

Selection of a particular grade of stainless steel should be primarily be to exploit its main properties. This article helps with the initial grade selection and covers corrosion resistance, physical and mechanical properties, fabrication and selction criteria.

2002年1月2日