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APPARATUS FOR DRILLING HOLES WITH EXPANSIONS FOR CAST-IN-PLACE PILES
APPARATUS FOR DRILLING HOLES WITH EXPANSIONS FOR CAST-IN-PLACE PILES
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机译:用于在现场浇筑桩扩孔的钻孔装置
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摘要
the invention относитс to drilling technology and construction. objective раса., promote the operational capabilities of the device. with the working body of the device, by a circular вовшового drill
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