Results for « 准直管 » (cmn)
03070587-n
平行光管, 瞄准仪, 准直管, 准直器, 平行 光管, 准直仪
collimator
     optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens; light rays leave the slit as a parallel beam
 

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