| 摘要 |
An anchoring device comprising an elongated member, a plurality of inclined lateral vanes extending from said elongated member adjacent a first ground penetrating end thereof, said vanes each forming an acute angle with the axis of said elongated member and being provided with a weakened portion intermediate its length whereby rotation of said elongated member after insertion in the ground will result in the bending of said vanes and head means on the second end of said elongated member for enabling the rotation of said member.
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