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In the mechanical testing of building materials and metal materials, due to the good control pe
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WeChat is a software for communication tools, social plat
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In the severe environment and energy dilemma, partial electr
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March 26, 2014, at the 2014 annual meeting of China's r
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LED lighting is the third light source revolution after incandescent and fluorescent lamps
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Recently, the US Department of Energy (DOE) released a report on the application of early