Document Type and Number:
Japanese Patent JPH045597
Kind Code:
Y2
Application Number:
JP9163184U
Publication Date:
February 17, 1992
Filing Date:
June 21, 1984
Export Citation:
International Classes:
E21B1/26; E21B1/00; E21B21/00; F02D9/02; F02D29/04; (IPC1-7): E21C7/00; E21C3/20; F02D9/02; F02D29/04
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