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Title:
DRILL BIT
Document Type and Number:
Japanese Patent JPS5941594
Kind Code:
A
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Inventors:
YATSU SHIYUUJI
HARA AKIO
MIYAKE MASAYA
Application Number:
JP15211282A
Publication Date:
March 07, 1984
Filing Date:
August 31, 1982
Export Citation:
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Assignee:
SUMITOMO ELECTRIC INDUSTRIES
International Classes:
E21B10/46; (IPC1-7): E21B10/46
Attorney, Agent or Firm:
Tetsuji Ueshiro



 
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