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Medical Stethoscope of Professional Stethoscope Manufacturer Supply Sprague Stethoscope
The stethoscope is identifying the heart blood pressure and other vital signs;
Vibration transmission between the principle of the stethoscope is material involved in the aluminium film of the stethoscope, and single than air, change of the voice frequency, wavelength, up to the human ear the scope of "comfort", at the same time has covered the other voice, "hear" more clearly.
People hear the sound of the reason is the so-called "voice" is vibration transmission such as air vibration material to each ear tympanic membrane, etc., into electrical impulses, one is "listen" to the sound. The human ear can feel the vibration frequency of 20-20 KHZ.
People feel is standard and a volume of sound, and wavelength is related to the intensity of the normal hearing range of 0 db, 140 db.
Packing: 50PCS/CTN
Carton size: 52*38*42cm
N.W.:6kgs
G.W.:6.5kgs
@CONTACT US.....
Manufacturer: Ningbo Safebond International Trade Co., Ltd
Address: Room 1201, NO 757, RILI Road, Yinzhou District, Ningbo, China.
Tel: 0086-574-87813077 Mobile:13165938530
Fax: 0086-574-87931698
Web:safebond.en.china.cn
Thank you appreciate to coming!!wish you a happy life!!!!
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