Document Type and Number:
Japanese Patent JPH0420078
Kind Code:
B2
Inventors:
OOTA AKINORI
Application Number:
JP21376783A
Publication Date:
March 31, 1992
Filing Date:
November 14, 1983
Export Citation:
Assignee:
FURUKAWA CO LTD
International Classes:
E21B19/08; B23P11/02; B23P15/14; E21B1/00; E21B1/26; F16D3/06
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