focometer focimeter焦距计
coincidence focometer重合式焦距仪
automatic focometer全自动焦距仪
Verification Regulation of Focometer焦距仪检定规程
Verification regulation for focometer焦距仪检定规程
front-focometer前焦距计
N（名词） an instrument for measuring the focal length of a lens 焦距仪