how to use Bucket auger drilling method for pile hole drilling
Автор: How To
Загружено: 2017-03-18
Просмотров: 7127
Описание: according to the geological condition to prevent that the density is too high for the drilling to go smoothly or so low that the hole could collapse. The ascend and descend of the drill head should be vertical to prevent any impact against the hole wall.
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