出瞳直径 ( Exit pupil diameter ): 2.5mm
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diameter of exit pupil 出瞳直径
This measuring system is specially designed to solve the diameter and distance of exit pupil of the gun optical sighting for some factory.
本测试系统是为解决某单位枪用光学瞄具出瞳直径、出瞳距离的测试而研制的。
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