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High accuracy (accuracy of 0.5-1.0 mm in 1 km course) accurate (accuracy of 4-5 mm. to 1 km running)Technical (to 16 mm)On the method of leveling is subdivided into: GeometricTrigonometricThe BarometricMotor HydrostaticIn Russia the State base network is divided into 4-e class: class 1 accuracy of + _ 0.5 mm11-th class, the accuracy of + _ 1 mmNivelirnye items are fixed on the ground through 5-7 km.Information about nivelirahThe first mention of water nivelire in the 1 centuryThe invention of the telescope, the barometer, the level 16-21In Russia the first spirit level with a pipe is made by Petra 1 (1725), NIGERIAIn West AfricaIt is washed by the Atlantic Ocean923 k in size. kV. km.Population of over 126 million.Features 10-Yu sea portsNetherlands
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