Document Type and Number:
Japanese Patent JPH0328232
Kind Code:
Y2
Application Number:
JP11830786U
Publication Date:
June 18, 1991
Filing Date:
August 02, 1986
Export Citation:
International Classes:
E21B43/01; F16L29/00; (IPC1-7): F16L29/00; E21B43/01
Next Patent: JPH0328233