Early introduction and studies on the western double reflecting octant in china 中國早期對西方雙反射八分儀的介紹和研究
The overall design of the double reflector optical - electronic theodolite is studied on the background of " the x small remote - control optical - electronic theodolite " 以“ x小型遙控光電經(jīng)緯儀”為背景,研究了雙反射鏡式光電經(jīng)緯儀的總體設(shè)計。