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河道大断面測量工作,对我县来說是一件新的工作,沒有仪器,既便有了仪器,会使用的仅一兩个人。为了克服这个困难,同志們开动了腦筋,根据經緯仪測量的原理创制了一件簡易測距仪器,經实际实驗,精确度合乎要求。此种仪器構造簡單,利用小平板的三角架,自制一木質繪圖板(長0.57公尺,寬0.45公尺,厚0.01公尺),圖板上放一度盤(三合板的,直徑42公分,精度10分),能自由轉动,兩边設有固定螺絲,上放一木質照准器(長43公分,寬3.5公分),中間設鋼質縱
The large-scale survey of the river course is a new job for our county. There is no instrument, and only one or two people will use it even if there is an instrument. In order to overcome this difficulty, the comrades started their brains and created a simple ranging instrument according to the theodolite measurement principle. The actual experiment shows that the accuracy meets the requirements. This kind of instrument is simple in structure. It makes a wooden drawing board (0.57 meters in length, 0.45 meters in width and 0.01 meters in thickness) by using a tripod of a small flat panel. The first time a disk (three-ply, 42 centimeters in diameter and accuracy 10 points), can rotate freely, fixed screws on both sides, placed on a wooden albedo (length 43 cm, width 3.5 cm), the middle of the steel vertical