CONTEC SC23 Double-head Stethoscope alloy external superior quality use medical professional stethoscopes SC23
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Stainless steel 100 Hz-500 Hz as the reference of the testing sound source: Outer diameter of auscultation head ≤ 35 mm, damping ≤ 30 dB Outer diameter of auscultation head > 35 mm, damping ≤ 16 dB 500 Hz-1000 Hz as the reference of the testing sound source: Outer diameter of auscultation head ≤ 35 mm, damping ≤ 25 dB Outer diameter of auscultation head > 35 mm, damping ≤ 20 dB

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Stainless steel 100 Hz-500 Hz as the reference of the testing sound source: Outer diameter of auscultation head ≤ 35 mm, damping ≤ 30 dB Outer diameter of auscultation head > 35 mm, damping ≤ 16 dB 500 Hz-1000 Hz as the reference of the testing sound source: Outer diameter of auscultation head ≤ 35 mm, damping ≤ 25 dB Outer diameter of auscultation head > 35 mm, damping ≤ 20 dB