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AUTOMATIC_BLOOD

2014-11-15 14:10  
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AUTOMATIC_BLOOD
High-gail amplifier-microphone combination detects pulse beats and feeds them through shaper circuit to hold-relays that lock pressure gages at systolic and diastolic blood-pressure readings.-R. J. Roy and M. Weiss, Inexpensive Monitor Reads Blood Pressure Automatically, Electronics, 35:47, p 40-41.