Magnetic film 17,5 mm and 35 mm; magnetic film 17,5 mm, perforated along one edge, location of erasing, recording and reproducing heads for single and twin tracks— 2 стр.
Magnetic tape sound recording and reproducing systems - Part 5: Electrical magnetic tape properties (IEC 60094-5:1988 + A1:1996); German version EN 60094-5:1993 + A1:1996— 26 стр.