共 50 条
- [1] RADIO-COMMUNICATIONS IN THE RURAL LOCAL LOOP [J]. TELECOMMUNICATIONS AND PACIFIC DEVELOPMENT : ALTERNATIVES FOR THE NEXT DECADE: PTC 88, 1988, 11 : 363 - 365
- [10] A NEW UNDERGROUND RADIO-COMMUNICATIONS SYSTEM [J]. MINING CONGRESS JOURNAL, 1982, 68 (07): : 45 - 47