Explanatory notes
… instruments for projecting radiographs; magnifying microfilm, microfiche or other microform readers, whether or … bodies, frames and supports, enlarger masking frames , microfilm or microfiche feeders . * * * The heading also … 37.05 , 90.01 , 90.02 , etc., as the case may be). (b) Microfilm photocopying apparatus incorporating an optical …