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LABOVAL－2显微镜为原民主德国生产，其光源电压用旋转控制器控制在3V～7.5V之间，灯泡为6V、5W，我们使用一年左右，该显微镜所配灯泡全部烧毁，国内市场无此种灯泡出售。我们利用该灯原有固定螺座，用南京特种灯泡厂生产的卤钨灯加工自幼成功，因该好为6V、10W，亮度强于原好
The LABOVAL-2 microscope is produced by the former Democratic Republic of Germany. Its light source voltage is controlled by a rotary controller between 3V and 7.5V, and the bulb is 6V and 5W. We use it for about one year. All the bulbs equipped with this microscope have been burned out. The domestic market does not have this. Kind of light bulbs for sale. We have used the original fixed screw seat of the lamp and succeeded in processing the halogen lamp produced by Nanjing Special Bulb Factory. Since it was 6V and 10W, the brightness was better than the original.