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petzval lens
meaning in Chinese
珀兹休透镜
Related Words
petzval condition
petzval surface
petzval sum
petzval type objective
petzval protrait objective
petzval curvature of field
aphakic lens
anastigmatic lens
lens stalk
bertrand lens
petzval condition
petzval curvature of field
petzval protrait objective
petzval sum
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