In the automate machine relies on the principle of Oscillating wave. Instead of listening to the sound of the machine, soda into the arm cuff. The pressure sensor will measure the pressure of the wind to the point ya fit boats set the standard (approx. 180 mmHg). With open ventilation valve releasing air out slowly one by one to a ngachaban record wind pressure gradually enough to decrease to the point that blood can rush through blood vessels that have been tightly contracted as it has caused a wave of blood that ran through the blood vessels. Cuff, pressure rise and fall due to sensor Can catch the wind pressure rise and fall of the vibrating, are dropping. Where wind pressure began to rise and fall, until it yutkraphueam to show that blood pressure is the top and the bottom, respectively.
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