Magnetic tape sound recording and reproducing systems. Part 1: General conditions and requirements
Applies to the dimensional, mechanical and electrical requirements for non-perforated blank and pre-recorded magnetic tape and for the associated recording and reproducing systems such as reel-to-reel, cassette and cartridge. Gives methods of measurement and necessary tolerances to secure interchangeability of recordings.
Applies to line post insulators with insulating parts of ceramic material intended for a.c. overhead lines with a nominal voltage higher than 1 000 V and a frequency not higher than 100 Hz.