round bar shrinking machine Steel diameter reducing machine diame

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SJ-20 round bar shrinking machine Steel diameter reducing machine diameter reducing machine price

SJ-20 round bar shrinking machine Steel diameter reducing machine diameter reducing machine price

steel rod reduce diameter machine for producing mine anchors,anchor screws and long rod screws.the device can compress the material into the diameter of the thread at a time, and enhance the density and length of the material,and improve the tensile strength of the bolt.

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round bar shrinking machine Steel diameter reducing machine diame