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...The surpac mining module applications underground peg calculation using double set up method this application is designed to solve common mine survey problem of determining and checking or ordinates a new both back sight must be known exist in current co ordinate file technique provides better overall check on position than does button described below full distance between two pegs their relative elevations however until s verified by means closed traverse at some future date its absolute can not assured required fixing plus setup fore following quantities should measured observed vertical angles order verify positions these with respect theoretical values face left right one arcs horizontal slope from height collimation instrument bob if value roof then entered as negative positive...