70年代末对坦克直瞄射击训练,当时有一种测距仪比较难掌握,主要靠肉眼对镜内的立体感觉来测量距离。所以每个人的感觉是有差距的,有的人没有感觉,所以永远当不了测距手。测距镜里面有一条弓形的弧线,几十里路的物体好像就在眼前,比如山头、电线杆、树株、行人、庄稼都可以成为判断距离的参照物。 At the end of the seventies on the tank straight shot shooting training, there was a rangefinder is more difficult to grasp, mainly by the naked eye on the three-dimensional feeling of the mirror to measure the distance. So everyone’s feeling is a gap, and some people do not feel, so can never be a distance measure. There is a arcuate arc inside the goggles, tens of miles of objects seem to be at hand, such as hills, poles, trees, pedestrians, crops can become a reference to determine the distance.