Title:
DRILL ROD FOR IMPACT EXCAVATION
Document Type and Number:
Japanese Patent JPS63147083
Kind Code:
A
Inventors:
NIRUSU SHIYUTOURE HEDOMAN
Application Number:
JP25746087A
Publication Date:
June 20, 1988
Filing Date:
October 14, 1987
Export Citation:
Assignee:
SANDVIK AB
International Classes:
E21B17/042; E21B17/043; F16L15/00; (IPC1-7): E21B17/042
Attorney, Agent or Firm:
Aoki Akira (3 outside)