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По-украински

An underground survey is based on precisely the same principles as the geodetic one on the surface. The methods of reading angles and measuring distances, of computing azimuths, bearings, latitudes and departures, coordinates, and elevations, and of plotting the results are alike in all essentials. In their practical details, however, a number of differences are introduced by certain peculiar conditions under which a mine survey has to be conducted. These conditions are: 1. working in the dark requires that both the point to be sighted and the cross-hairs of a telescope must be illuminated. 2. working in constricted places and in passages through which traffic must not be interrupted often requires the use of special devices for mounting the instrument. 3. stations must be placed on the roof when possible to assure their permanence and visibility. 4. steeply inclined sights are more prevalent requiring that a transit shall be always in perfect adjustment. With very steep sights an

По-английски

An of underground survey is based on precisely the same principles as the geodetic one on the surface. The of methods of reading angles and measuring distances, of computing azimuths, bearings, latitudes and departures, coordinates, and elevations, and of plotting the results are alike in all essentials. In of their practical details, however, a number of differences are introduced by certain peculiar conditions under which a mine survey has to be conducted. These of conditions are: 1. working in the dark requires that both the point to be sighted and the cross - hairs of a telescope must be illuminated. 2. working in constricted places and in passages through which traffic must not be interrupted often requires the use of special devices for mounting the instrument. 3. stations must be placed on the roof when possible to assure their permanence and visibility. 4. steeply inclined sights are more prevalent requiring that a transit shall be always in perfect adjustment. With of very steep sights an