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2. List of commercially available roofing materials - Wikipedia

   en.wikipedia.org/wiki/List_of_commercially...

   Roofing material is the outermost layer on the roof of a building, sometimes self-supporting, but generally supported by an underlying structure. A building's roofing material provides shelter from the natural elements. The outer layer of a roof shows great variation dependent upon availability of material, and the nature of the supporting ...

3. Polycarbonate - Wikipedia

   en.wikipedia.org/wiki/Polycarbonate

   Polycarbonate is commonly used in eye protection, as well as in other projectile-resistant viewing and lighting applications that would normally indicate the use of glass, but require much higher impact-resistance. Polycarbonate lenses also protect the eye from UV light.

4. Hemlock Semiconductor - Wikipedia

   en.wikipedia.org/wiki/Hemlock_Semiconductor

   Its current facilities produce between 30,000 and 35,000 tons of polycrystalline silicon, [1] ranking it among the top five producers worldwide. [2] The company expanded with the Japanese joint venture partners Shin-Etsu Chemical and Mitsubishi Materials, for a new $1.2 billion plant opening near Clarksville, Tennessee. Though it officially ...

5. Tennessee State Fair - Wikipedia

   en.wikipedia.org/wiki/Tennessee_State_Fair

   The Tennessee State Fair is an annual state fair, formerly held in Nashville, Tennessee. Until 2021, the fair was generally held in the second week of September, as well as the weekends surrounding it. The fair regularly had attendance over 200,000 people per year while located at the Nashville Fairgrounds. [1]

6. Thin-film solar cell - Wikipedia

   en.wikipedia.org/wiki/Thin-film_solar_cell

   Thin-film solar cells, a second generation of photovoltaic (PV) solar cells: Top: thin-film silicon laminates being installed onto a roof. Middle: CIGS solar cell on a flexible plastic backing and rigid CdTe panels mounted on a supporting structure Bottom: thin-film laminates on rooftops Thin-film solar cells are a type of solar cell made by depositing one or more thin layers (thin films or ...

7. Polycrystalline silicon - Wikipedia

   en.wikipedia.org/wiki/Polycrystalline_silicon

   Left side: solar cells made of polycrystalline silicon Right side: polysilicon rod (top) and chunks (bottom) Polycrystalline silicon, or multicrystalline silicon, also called polysilicon, poly-Si, or mc-Si, is a high purity, polycrystalline form of silicon, used as a raw material by the solar photovoltaic and electronics industry.