短语词组短語focusing storage ring 弱聚焦存儲環weak -focusing storage ring 弱聚焦存儲環eyepiece focusing ring 目鏡調焦環;目鏡self -focusing ring 自聚焦環focusing ring for fiberscope 纖維光束內窺鏡用調焦輪ring focusing 環型聚焦 返回 focusing ring