安装在大楼出口附近或出口通道，这款小型扬声器能发出宽带噪声引导人们走向出口。
Installed near building exits or along egress routes, the compact speaker produces broadband noise to lead people toward exits.
安装在大楼出口附近或出口通道，这款小型扬声器能发出宽带噪声引导人们走向出口。
Installed near building exits or along egress routes, the compact speaker produces broadband noise to lead people toward exits.
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