সকল লিংক ভূমিসেবা জাতীয় ভূমি-তথ্য ও সেবা কাঠামো They were known as topographic devices, or theodolites. They bundled pivoted arms for sighting and will be useful for measuring both of those horizontal and vertical angles. Magnetic compasses may perhaps are actually incorporated on some. Almost all of our surveyors https://josephn429hpw7.wikicorrespondence.com/user