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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
This just means the electricity is clean and has extremely little or no disturbances in its frequency. Very similar to tuning in a radio station, think of the non-stations or static between radio stations as non-sine or "dirty" electricity.
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