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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
You're supposed to fill speed bags with air. Pump the hand pump until all the wrinkles in the speed bag vanish and the skin feels smooth. Pump the handle one or two more times to give the bag more bounce, then remove the needle.Squeeze the speed bag to feel the resistance. A properly-inflated bag should feel tight while enabling you to slightly push in the external skin.
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