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Amazon.com: STEELMAN EngineEAR Stethoscope Auto Diagnostic Tool, Noise-Canceling Headphones, Ulta-Sensitive Microphone, 9 Volt Battery Included : Industrial & Scientific
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Amazon.com: STEELMAN EngineEAR Stethoscope Auto Diagnostic Tool, Noise-Canceling Headphones, Ulta-Sensitive Microphone, 9 Volt Battery Included : Industrial & Scientific
Steelman 06606 | Electric Stethoscope Combination With Db Meter | 20C896 | Raptor Supplies Worldwide
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Amazon.com: Steelman EngineEAR II Stethoscope Auto Diagnostics Tool, 60-120 Decibel Meter, Noise-Canceling Headphones, Non-Conductive Microphone : Industrial & Scientific
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