| 1. | Most inventions basic to the construction of radio transmitters and receivers had been perfected before the first world war .
为建造无线电发射机和接收机奠定基础的大多数发明，在第一次世界大战前就臻于完善。 |
| 2. | Most inventions basic to the construction of radio transmitters and receivers have been perfected before the first world war .
为建造无线电发射机和接收机奠立基础的大多数发明，在第一次世界大战前就臻于完善。 |
| 3. | Poulsen - arc radio transmitter invented
发明浦尔生电弧无线发射机。 |
| 4. | Aircraft radio transmitter
飞机用无线电发射机 |
| 5. | Replacement of high power high frequency and medium frequency radio transmitters
更换高功率高频及中频无线电通话器 |
| 6. | Miniature radio transmitter
小型无线电发报机 |
| 7. | Methods of measurement for radio transmitters - transposers for fm sound broadcasting
无线电发射机测量方法.第11部分:调频广播转发器 |
| 8. | Methods of measurement for radio transmitters employing f3e emission used in the mobile services
移动通信调频无线电话发射机测量方法 |
| 9. | Another successful raid against suspected use of unlicensed radio transmitter equipment
电讯局再次成功扫荡怀疑无牌使用无线电发射设备 |
| 10. | Methods of measurement for radio transmitters ; part 3 : wanted and unwanted modulation
无线电发射机测量方法.第3部分:有用调制和无用调制 |
