共 16 条
- [1] DEVELOPMENTS IN FREQUENCY-SHIFT VOICE-FREQUENCY TELEGRAPH EQUIPMENT POST OFFICE ELECTRICAL ENGINEERS JOURNAL, 1979, 72 (OCT): : 191 - 196
- [2] DEVELOPMENTS IN FREQUENCY-SHIFT VOICE-FREQUENCY TELEGRAPH EQUIPMENT. Post Office Electrical Engineers Journal, 1979, 72 (pt 3): : 191 - 196
- [4] A WIDEBAND MULTI-CHANNEL VOICE-FREQUENCY TELEGRAPH SYSTEM POST OFFICE ELECTRICAL ENGINEERS JOURNAL, 1967, 60 : 10 - &
- [8] VOICE FREQUENCY TELEGRAPH TRANSMISSION SYSTEM WT1000D, A NEW TELEGRAPH AND DATA TRANSMISSION SYSTEM. 1978, 45 (02): : 64 - 69
- [9] PRESHIFT MECHANICAL FILTER FOR VOICE FREQUENCY TELEGRAPH TRANSMISSION-SYSTEM IEEE TRANSACTIONS ON SONICS AND ULTRASONICS, 1980, 27 (03): : 142 - 142
- [10] VOICE FREQUENCY TELEGRAPH TRANSMISSION-SYSTEM WT1000D, A NEW TELEGRAPH AND DATA-TRANSMISSION SYSTEM SIEMENS REVIEW, 1978, 45 (02): : 64 - 69