[光] main lens
... main laboratory minicomputer 实验室用主小型计算机... main lens 主透镜... main line 干线,主线...
primary lens
... + *Proper name 专有名称 + *primary lens 主透镜 - View Level 视场级别 ...
main lens of the electron gun
main focusing lens
central plane of the objective ; central lens plane ; lens prinicpal planes of