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。
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。
The Advantest TR4135 is suitable for measurements on 900-MHz mobile radiotelephone equipment, fixed broadcast stations and mobile A-band equipment.
该爱德tr4135适合测量900兆赫
动无线电话
，固
站和动宽
。
The existing words, ""Cargo Ship Safety Radiotelegraphy Certificates or Cargo Ship Safety Radiotelephony Certificates"" are replaced by ""or Cargo Ship Safety Radio Certificates"".
将现有文字“，货船无线电报安全证书或货船无线电话安全证书”改为“或货船无线电安全证书”。
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