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Amazon.com: Professional Sound Level Meter with Backlight Display High Accuracy Measuring 30dB-130dB : Industrial & Scientific
Measuring instruments: (a) sound level meter TES-52A, (b) noise dose... | Download Scientific Diagram
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SLM25TK Sound Level Meter with Data Logging Function Measure 30dB~130dB and CD Software - Tekcoplus Ltd.
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