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At ordinary times, eustachian tube by extrusion and surrounding tissue in the export of nose pharynx ministry in closed state, but when the baby swallowing, chewing, sneezing, or crying, in order to maintain the balance of inside and outside the middle ear pressure, open eustachian tube is a moment. Because the baby's ear has not yet developed, eustachian tube is relatively short, low and flat, and position if you cross holding the baby, let him lie on your back with milk, milk bottle mouth open too large, bottles, vertical too straight, etc., are likely to cause the baby choking milk, and make the milk along the eustachian tube into the middle ear, induce otitis media.
For sale is a whole new, professional DC regulated power from Mastech, Model number HY1803D. This is a highly stable, excellent linear energy having its output continuously adjustable at 0-18V DC and 0-3A. The unit comes with 2 LCD displays, providing accurate readout to the voltage and current values.
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