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消防应急广播等需要测声音用的分贝仪，大家可以了解一下
分贝仪
在实践中的消防知识，设施的相关视频汇总8/17
App00:08
App00:18
App00:42
App00:23
App00:18
App00:31
App00:24
App00:15
App01:27
App00:34
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App00:37
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App01:36
App01:21
App00:40分贝仪
App00:08App00:18App00:42App00:23App00:18App00:31App00:24App00:15App01:27App00:34App00:20App00:37App00:44App00:55App01:36App01:21App00:40
