| 摘要 |
PURPOSE: An anchor bolt is provided to minimize wastes of resources and funds by collecting and reusing the anchor bolt after construction. CONSTITUTION: An anchor bolt comprises a pipe. A cut surface is formed on the outer surface of the pipe. When the anchor bolt is installed, the cut surface flows into the pipe. And the cut surface is securely adhered to an internal anchor which rotates in the pipe. The anchor bolt is collected by releasing the internal anchor using a collector.
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