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 Measure size axial люфтов bars of draft and a spherical finger of an external tip (C).   Measure efforts of resistance to lateral deviations of draft and a spherical finger of an external tip (And).   Measure a torque of rotation of a spherical finger of an external tip (In).  |  |  
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Measure the geometrical extent L and l 
of draft.   |  |  
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Compare results of measurements to requirements of Specifications, in case of need make the corresponding adjustments, or replace draft.  |  |