afocal attachment lens
... Afocal 无焦点竹 afocal attachment lens 附加望远镜头 afocal doublet 无焦双透镜 ...
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公司还自主研制了放大镜、显微镜、望远镜及各类附加镜头。
In addition, our company has independently developed a magnifier, microscope, telescope and kinds of conversion lenses.
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