CPC Subgroup
G03B 27/62 Holders for the original (G03B27/53 takes precedence )
Full Title
Photographic printing apparatus > Projection printing apparatus, e.g. enlarger, copying camera > Details > Holders for the original (G03B27/53 takes precedence )
3 direct subcodes
Child Classifications
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- G03B 27/64 using a vacuum or fluid pressure