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据报道,美国北卡罗来纳农业大学研制了一种氦氖单色农用激光器,这种激光器的辐射强度只有日光灯的十分之一,它只辐射
It is reported that the Agricultural University of North Carolina, the United States developed a He-Ne monochromatic agricultural laser, the laser radiation intensity of only one-tenth of fluorescent lamps, it only radiation