C21D 7/12
Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies
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Edits on 16 Mar, 2022
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Edits on 5 Mar, 2022
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C21D 7/12
Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies
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