美利体育登录入口官网:DIN ISO 14133-2:2006 光学和光学仪器.双筒望远镜、单筒望远镜和定位观测望远镜的规范.第2部分:高性能仪器(ISO 14133-2-2006)
Optics and optical instruments - Specifications for binoculars, monoculars and spotting scopes - Part 2: High performance instruments (ISO 14133-2:2006) English version of DIN ISO 14133-2:2006-08