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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
All clinometers of this kind use one straw or sighting tube; there is no need for another straw or sighting tube, but some azimuth measuring instruments do use two sights so you can take two measures at one time (geodetic repeating circles). But they are for azimuth (left and right), they are therefore not a clinometer that measures elevation.
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