sirens Power: Three-phase 380V Connection: Rated Rotational Speed: 2960/Minute Average Sound Intensity: more than 132dB/5 We can provide sirens used in Civil Defense,disaster prevention and flood control and enable us successfully market over differRated Power: 4 KWPower: Three-phase 380VConnection: Rated Rotational Speed: 2960/MinuteAverage Sound Intensity: ≥132dB/5MSound Frequency: 480± ...
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