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Function/Purpose:Used in observing direction and position.(Written by YEN, JIN-SHENG)
Characteristics:A theodolite is an instrument used to measure both horizontal and vertical angles. It was invented by a British engineer, Sisson, in 1730. After modification and reinforcement, this device was formally used for geographic surveys in Britain. In 1904, Germany started to produce theodolites with glass circles, on a large scale. With the development of electronic technology, electronic theodolites first appeared in the 60’s. Based on this foundation, electronic tacheometers were introduced in the 70’s. Designed by the Principles of angle measurement, a theodolite is a basic measurement instrument for the measuring of horizontal and vertical angles. Inside the theodolite, there are two perpendicular axes which are used to adjust the angle and horizontal level of the telescope.(Written by YEN, JIN-SHENG)
Type:Long-distance and International Transmission Media-Tool and Device
Place Made:Unspecified
Date Made:Unspecified
Year in Use:1961-1980
Size:LENGTH:17.8 cm WIDTH:25.3 cm HEIGHT:34.2 cm



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