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最佳答案:Light Emitting DiodeLED energy Saving bulbsLED flourescent style lampLED spot La
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最佳答案:Studied the single-LED light intensity distribution,the establishment of a singl
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最佳答案:LED light bulbs for indoor lighting purpose has not significant advantages over
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最佳答案:1. place the sample on a flat surface2. set the microscope straightly with hands
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最佳答案:1)place the sample on a flat surface.2) Manually install the microscope, object