| 21. | join the convention on wireless telegraphy |
| 参加（国际）无线电报公约
|
| 22. | wireless [radio] service |
| 无线电通讯设施[业务]
|
| 23. | a radio [ wireless ] set |
| 无线收音机.
|
| 24. | a radio [radio broadcasting, wireless ] station |
| 无线电台
|
| 25. | install a wireless station |
| 安装无线电台
|
| 26. | a wire [ wireless ] telegram |
| 有线[无线]电报
|
| 27. | telegraph by wireless |
| 发无线电报
|
| 28. | a radio [ wireless ] telephone |
| 无线电话
|
| 29. | transmit the voice by wireless |
| 通过无线电传递声音
|
| 30. | turn on [off] the wireless |
| 开[关]收音机
|