Patent AT-E400830-T1: [Translated] OPTICAL OPTION MOUNTING RING
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The optical option attachment ring (10) of the present invention includes a rotator (40) having an abutting surface (41) that projects inward from the inner...
本发明的光学选配附件环(10)包含一旋转体(40),该旋转体带有一从内侧向内凸起的抵接面(41)……



