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900兆赫移动无线电话设,广播站和移动宽带设。
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