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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
Any dial barometer aneroid or mercury will always have some amount of 'sticktion' therefore a GENTLE tap is normal. (Tapping actually helps the user as it indicates which way the barometer is moving at the time it is being looked at.).
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