Detail

definition
Discs issued at 78 rpm are usually coarse. Cylinders issued at 120 rpm (which have 100 grooves per inch) are usually standard.
English
Published

Other Properties

English preferred label coarse/standard Published
English notation a  Published
English definition Discs issued at 78 rpm are usually coarse. Cylinders issued at 120 rpm (which have 100 grooves per inch) are usually standard. Published