Improved transmission system for hf radiotelephone circuits .

高频无线电话电路的改善的传输系统。

Technical characteristics of single-sideband equipment in the mf and hf land mobile radiotelephone service .

mf和hf陆地移动无线电话业务中的单边带设备的技术特性。

October 21 , first transmission of speech across the atlantic by radiotelephone , arlington , va. , to paris .

10月21日，无线电话横跨大西洋，从弗吉尼亚的阿林顿至巴黎，实现首次话音传输。

July 16 , world 's first radiotelephone service , between los angeles and santa catalina island , opened to the public .

7月16日，全球第一个无线电话业务，从旧金山至圣塔卡特莱那岛，正式开通。

" Provided that if a ship carries one radiotelephone operator exclusively employed for duties related to radiotelephony , it shall not be necessary to carry a second radiotelephone operator . "

但如船舶载有一名受雇专责执行有关无线电话的职务的无线电话值机员，则无须载有第二名无线电话值机员。