bored underreamed pile的意思|示意

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钻孔扩孔桩

扩底钻孔灌注桩 ... 扩底钻孔灌注法 bored underreamed pile 扩底钻孔灌注桩 bored underreamed pile; pedestal pile 无套管钻孔灌注桩 uncased pile ...