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selective calling system

通讯, 运输, 政治 système d'appel sélectif
 英语 词库
selective calling system
航空, 加拿大 A system that provides an automatic and selective method of calling any aircraft. Voice calling is replaced by the transmission of code tones to the aircraft over the international radiotelephony channels. This system is installed on all international frequencies at Canadian stations.
selective calling system
: 3 短语, 1 学科
通讯3

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