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| 若有安裝色情守門員,可用無界、自由門等軟件瀏覽伊莉。或使用以下網址瀏覽伊莉: http://www.eyny.com:81/index.php There are many forms of solar energy. Forty years ago, I installed a solar water heater system in my house in Arizona. On the roof top, it has a loop of copper tube inside of an aluminum box to collect sun light to heat up the water that got circulated by gravity into a hot water tank. It provided hot water for our family of four all year long except a few cold cloudy days in the winter time. Savings for electricity (about $15 a month) for hot water paid for the solar system cost (about $300 after Federal tax credit) in less than two years. ... |
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