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  • Publication Date: October 21, 1988
  • Publication Number: JP-S63161990-U

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    Patent Citations (1)

      Publication numberPublication dateAssigneeTitle
      JP-S6239994-B2August 26, 1987Kikunoka Shuzo Kk, Masahisa Takeda

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      Publication numberPublication dateAssigneeTitle
      JP-H02120493-AMay 08, 1990Koken Shisui Kogyo KkDown-the-hole drill