Combined with the average pile drilling speed of our rig, it takes <br><br>an average of 53 days to drill a drill for 200piles/day , and the <br>average drilling time for two drills is 27 days in 2 months . <br>The average time of the three rigs is 18 days. <br><br>Are you sure of the number of rigs purchased? <br>look forward to your reply
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