... 投影三脚架：projection tripod 投影目镜：projection eyepiece 投影镜头，放映镜头：projection lens ...
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... 平场目镜flat-field ocular 投影目镜projective ocular 可调焦目镜focusable coular ...
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短语
目镜投影法
eyepiece projection
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photo(-)eyepiece
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photo(-)eyepiece
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projection eyepiece
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