pa system
参考词典中pa system的常规释义：
基本释义
- 【电】 Public-AddressSystem的简写
英英解释
1个名词解释
- an electronic amplification system used as a communication system in public areas
[同] p.a., p.a. system, pa, pa system, public address system
点击查看……- an electronic amplification system used as a communication system in public areas
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