2. Try not to interfere in the drilling water wells for water are causing the crash. Because when the drilling is to take air cutting up to a rock that makes up more or less strong, broke down in holes, making the hole was lost. The location of the drill holes and the depth will be an update of the work by the survey data, which will be used in the design. The penetration depth is 9 meters for sub drill 1 meter drill hole using a 4-inch drill penetration rate of approximately 18-30 meters per hour.
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