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Decibel Meter Sound Pressure Level Meter (SPL) with Backlight Alarm, Portable Sound Decibel Level Meter 30~130dBA, Noise dB Sound Meter Audio Volume Monitoring Instrument Meter for Home Office: Amazon.com: Industrial & Scientific
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Scale meter with low, high and medium bar. Level risk graph or control quality. Vector isolated illustration 17556035 Vector Art at Vecteezy
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