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PCE
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CPC Subgroup
B21H 3/12

articles with helicoidal surface (bending strip or the like helically B21D11/06)

Full Title

Making helical bodies or bodies having parts of helical shape (helical gears B21H5/00; forming tubes or tube walls into helical shape B21D11/06, B21D15/04) > articles with helicoidal surface (bending strip or the like helically B21D11/06)