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Test: Laser beam come from long distance 1.4KM green/red/blue laser beam
Test: Laser beam come from long distance 1.39KM green/red/blue laser beam Shoot a few photos of laser backlight. The experimental site is as follows: two bridge on the river is the experimental site. The distance is 1.39 kilometers Using cell phones to shoot, the effect is not very good, the actual much clearer than this. ...