Title:
A manufacturing method of a welding steel pipe
Document Type and Number:
Japanese Patent JP5954009
Kind Code:
B2
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Inventors:
Hiroshi Yano
Naoya Hayakawa
Naoya Hayakawa
Application Number:
JP2012158302A
Publication Date:
July 20, 2016
Filing Date:
July 17, 2012
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B23K26/21; B21C37/08; B23K9/025; B23K9/16; B23K9/18; B23K26/00; B23K26/067; B23K26/262; B23K28/02; B23K33/00
Domestic Patent References:
| JP2008043974A | ||||
| JP7001170A | ||||
| JP60231574A | ||||
| JP2011224655A |
Attorney, Agent or Firm:
Kenichiro Ochiai
Eiichi Kobayashi
Eiichi Kobayashi