⑺ bore quality checks:As the rig with a high degree of vertical control system and the rigidity of the drill pipe and guide system, similar projects in the past, the aperture, vertical, residue of hole bottom margin indicators testing, may meet the requirement specifications and acceptance criteria.After the cleaning is completed, the hole is detected, testing includes aperture, vertical, in line with the steel lattice work carried out in a timely manner upon request.
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