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扩音系统 kuòyīn xìtǒng
adv. public-address system
el. public address system
sport. amplification system
tech. sound amplification system; sound amplifying system
有线广播扩音系统 kuòyīn xìtǒng
gen. public address system
扩音系统: 11 phrases in 5 subjects
Advertising1
Communications1
Electronics4
Technology4
Telecommunications1