2. Try not to disturb the water bore area because water caused the hole and hole collapse. Because of the time to take cutting drill can be blowing up a water with the broken stones or less strong value hole collapse make holes; The position of the borehole and the depth is the level of the update by parties. Survey which information will be used in the design, by drilling to drill 9 meters. If sub drill 1 meters, drilling a hole straight drill 4 inches rate drilling approximately 18-30 meters per hour. When a drilling and would send a drill to the survey pasting hole at the edge of the pattern then it is the duty of the drill set to put the main itself. Design was derived.
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