DIN 40015-1985《频率和波段》
In this standard terms are assigned to frequency bands from 10<(hoch)0> Hz up to 10<(hoch)24> Hz and wave bands from 3 * 10<(hoch)8> m up to 3 * 10<(hoch)-16> m. In the field of radion engineering band numericals and initials are given.