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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
Wind vanes measure the direction that the wind comes from (e.g., if the wind is blowing from the north, the pointer will point north, into the wind). You need a different kind of tool, called an anemometer, to measure wind speed.
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