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Title:
BORING OF PIT DUE TO DRILL
Document Type and Number:
Japanese Patent JPS59118984
Kind Code:
A
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Inventors:
KIDO TADASHI
Application Number:
JP23131682A
Publication Date:
July 09, 1984
Filing Date:
December 22, 1982
Export Citation:
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Assignee:
KIDO TADASHI
International Classes:
E21B7/00; (IPC1-7): E21B7/00
Attorney, Agent or Firm:
Nobuyuki Fujii



 
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