共 50 条
- [32] LOW FREQUENCY CORRELATOR WITH CONTINUOUSLY VARIABLE DELAY INSTRUMENT PRACTICE, 1970, 24 (12): : 828 - &
- [35] LOW-FREQUENCY LORAN PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1947, 35 (02): : 175 - 175
- [36] LOW-FREQUENCY ANTENNAS PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1951, 39 (06): : 717 - 717
- [38] LOW-FREQUENCY MICROPHONE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1961, 33 (06): : 854 - &