objective angular field 物镜视场角
flat-field objective 平场物镜 ; 平场透镜 ; 平扫描场物镜
flat-field achromatic objective lens 平场消色差物镜
objective angle of image field 像场角
field achromatic objective lens 平场消色差物镜
flat-field objective lens 平视野物镜
objective for bright-field observation 明视场物镜
flat field objective 平场物镜
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