BS 5550-9.4.1:1989 - Cinematography. 17.5 mm film. Sound. - Specification for the positions and width dimensions of recording head gaps for two sound records on 17.5 mm magnetic film
BS 5550-9.4.1:1989
Cinematography. 17.5 mm film. Sound. - Specification for the positions and width dimensions of recording head gaps for two sound records on 17.5 mm magnetic film
This International Standard specifies the lateral positions and width dimensions of the recording heads for two magnetic sound records and control track on17,5 mm single perforated magnetic recording film.
BS 5550-9.4.1:1989 - Cinematography. 17.5 mm film. Sound. - Specification for the positions and width dimensions of recording head gaps for two sound records on 17.5 mm magnetic film