pa system sound
广播系统声音
以上为机器翻译结果，长、整句建议使用 人工翻译 。
T12 is a full-range multi-purpose two-frequency, can be used for fixed installation, Hall PA, flowing performance, and supporting large-scale sound reinforcement system fills and so on.
T12是一款全频多用途两分频，可以用于固定安装、厅堂扩声、流动演出以及大型扩声系统的辅助补声等等。
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The school's PA system was still on from the morning announcements and every sound in the building was amplified.
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