首页>
外国专利>
METHOD AND APPARATUS FOR MAKING CAST IN PLACE PILES WITH SEVERAL ENLARGED SECTIONS BORED DEEPER THAN 50 METERS AND ENLARGED SECTIONS IN PRODUCTIVE LAYER RANGE BY BORING WELLS USING KNOWN AND AVAILABLE IN COMMERCE APPARATUSES
METHOD AND APPARATUS FOR MAKING CAST IN PLACE PILES WITH SEVERAL ENLARGED SECTIONS BORED DEEPER THAN 50 METERS AND ENLARGED SECTIONS IN PRODUCTIVE LAYER RANGE BY BORING WELLS USING KNOWN AND AVAILABLE IN COMMERCE APPARATUSES
