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紧急报警系统
space emergency alert system
紧急报警系统美国联邦通信委员会 (FCC),联邦应急管理局 (FEMA) 和国家气象服务 (NWS) 三个部门建立的当国家处于紧急状况时迅速通告全民的通信方式
avia. emergency alert system (美国)
紧急报警系统
: 2 phrases in 2 subjects
Automobiles1
Electronics1

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