云南福利彩票快乐十分历史开奖结果

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with solar energy, direct radiation from the sun is used in the form of heat or converted directly into electrical energy. in a very short period of time, several technical solutions were developed in this area with different advantages.

solar energy is economically useful in large parts of the world – ranging from very small applications and roof installations up to large-scale projects created by the energy suppliers.

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