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底-正摄影系统
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底-正摄影系统
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negative-positive photographic system
底-正摄影系统
感光材料经曝光冲洗获得负像后称为底片,印相纸经由底片进行接触印相冲洗获得正像后,或者放大纸经由底片进行放大冲洗获得正像后,称为照片,此摄影成像系统称为底-正摄影系统。又称负-正摄影系统。
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iatrophysics
IATTC
IAU
IAU2009天文常数系统
IAUC
IAU Circular
IAU galactic coordinate system
IAU galactocentric distance
IAU Oort constants
IAU Planetary Photograph Center
IAUS
IAU System of Astronomical constants
IAU Working Group for Future large scale facilities
IAU Working Group for Planetary system nomenclature
IAU Working Group in History of astronomy
IAU Working Group on Astronomiacl data
IAU Working Group on Astronomical standards
IAU Working Group on Comets
IAU Working Group on Designations
IAU Working Group on Earth rotation in the HIPPARCOS reference frame
IAU Working Group on Lunar based astronomy
IAU Working Group on Minor planets and Meteorites
IAU Working Group on Near Earth objects
IAU Working Group on Parallax standards
IAU Working Group on Peculiar stars
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