Title:
【発明の名称】外面に多数の凹部を有する円管の製造装置
Document Type and Number:
Japanese Patent JPS6045967
Kind Code:
B2
Inventors:
HATSUTORI MATSUTARO
Application Number:
JP14404982A
Publication Date:
October 14, 1985
Filing Date:
August 20, 1982
Export Citation:
Assignee:
HATSUTORI SEISAKUSHO JUGEN
International Classes:
B21D28/28; B21D31/00; B21D31/02; (IPC1-7): B21D31/00
Attorney, Agent or Firm:
Dan Rokuro
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