Drilling tool for two-way soil-cement mixed pile
The invention relates to a drilling tool for a two-way soil-cement mixed pile. The drilling tool comprises an inner drilling rod, an outer drilling rod, an inner drilling bit and an outer drilling bit, wherein a water gas injection device is arranged at the upper part of the outer drilling rod, a ca...
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Main Authors | , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
20.06.2012
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Subjects | |
Online Access | Get full text |
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