| 摘要 |
The invention relates to the head 13 of pliers for tying a metal wire 2 on two concrete irons 3, 4. As it rotates in order to twist the wire 2, the head 13 advances towards the irons 3, 4. Then it stops advancing but continues to rotate in order to shear the wire. Application: improvement of tightening; elimination of accidental fractures. <IMAGE>
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