Optical equipment is the a most important part of tank fire control system, and the original location of optical equipment is an important process for the maintenance of tank fire control system.
观瞄仪器是坦克火力控制系统的重要组成部分，观瞄仪器的原位检测是坦克火控系统的维修保障的重要环节。
Distortion of optical system makes focal length of advanced fire control dynamic performance test system different at different FOVs, and influences angle-measuring precision.
在先进的火炮动态性能测试系统中，光学系统固有的畸变使得不同视场下的实际焦距不同，间接地影响系统的测角精度。
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