| 摘要 |
A foundation anchor for fastening the base of a machine upon a foundation is equipped with a vertically extending anchor bolt movable in its axial direction, with a clamping nut being provided for attaching the base of the machine to the anchor bolt at the upper end thereof. The bottom of the anchor bolt is pivotally mounted within a cavity which extends beneath the upper surface of the foundation and compensating rings, having a wedge-shaped sectional configuration taken in the axial direction, are provided between the base of the machine and the clamping nut.
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