Public Address systems (PA systems) are commonly used in American malls, airports and grocery stores.
公共广播系统在美国的商场、机场、和杂货店普遍使用。
Combo amplifiers for bass, guitars, keyboards, electronic drums and PA systems. Please reply with full specifications, pictures.
求购用于贝斯，吉他，键盘，电子鼓，扩音系统的组合放大器。请回复详细规格和图片。
Rupert Chapman, an IT risk management consultant at PA Consulting, said: "They've found that the systems were not up for the job and there is a real case for change."
PAConsulting的IT风险管理顾问鲁珀特•查普曼表示：“他们发现这些系统无法胜任工作，确实需要改变。”
The physicochemical and biological two stages treatment systems was imported to Pa- per Mill A of Guangzhou Victorgo Industrial Co. Ltd. from YIT, Finland.
广州威达高实业有限公司A厂引进芬兰YIT公司的物化一生物二级废水处理系统。
Power amplifiers (PA) used in 3G wireless communication systems based on spread spectrum techniques must exhibit exceptional linearity.
而基于扩频技术的第三代无线通信系统中的功率放大器必须要有很好的线性性能。
Power amplifiers (PA) used in 3G wireless communication systems based on spread spectrum techniques must exhibit exceptional linearity.
而基于扩频技术的第三代无线通信系统中的功率放大器必须要有很好的线性性能。
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