TREA

Making hollow articles not covered by a single preceding sub-group

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Industry

  • CPC
  • B21K21/00
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Parent Industries

BPERFORMING OPERATIONS TRANSPORTING B21Mechanical metalworking B21KMAKING FORGED OR PRESSED METAL PRODUCTS

Current Industry

B21K21/00Making hollow articles not covered by a single preceding sub-group

Sub Industries

B21K21/02Producing blanks in the shape of discs or cups as semifinished articles for making hollow articles B21K21/04Shaping thin-walled hollow articles B21K21/06Shaping thick-walled hollow articles B21K21/08Shaping hollow articles with different cross-section in longitudinal direction B21K21/10cone-shaped or bell-shaped articles B21K21/12Shaping end portions of hollow articles B21K21/14closed or substantially-closed ends B21K21/16Remodelling hollow bodies with respect to the shape of the cross-section
Industries