DIN 15552-4-1989《17.5毫米与35毫米磁软片;机械和电声要求》
The standard specifies the mechanical and electro-acoustic requirements on magnetic films 17,5 mm and 35 mm with PETP base for use on studio magnetic film transports.#,,#
The standard specifies the mechanical and electro-acoustic requirements on magnetic films 17,5 mm and 35 mm with PETP base for use on studio magnetic film transports.#,,#