Technology / Rockets / Perforation: Another term for core.
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Entertainment / Photography / Perforations: Accurately spaced holes punched throughout the length of film for still cameras. Basically the perforation function as a guide for precision registration of film and also provide mechanical movement f MORE
Technology / Rockets / Port Area: The cross section of a core, perforation or port - used in Hybrid tocalculate G (Mass Flux Rate). MORE
Entertainment / Photography / Sprocket Holes: Perforations on both edges of 35mm film, which engage with the teeth of the film transport mechanism. MORE