Document Type and Number:
Japanese Patent JPH0155834
Kind Code:
B2
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Inventors:
NAKAGAWA SHINJI
PPONMA AKIRA
FUKUDA HIDEO
PPONMA AKIRA
FUKUDA HIDEO
Application Number:
JP7822584A
Publication Date:
November 27, 1989
Filing Date:
April 18, 1984
Export Citation:
Assignee:
MITSUI CONSTR
International Classes:
F16L1/00; E01B25/00; F16L7/00
Next Patent: JPH0155835