Document Type and Number:
Japanese Patent JPH0315077
Kind Code:
B2
Inventors:
SATO YOSHIAKI
Application Number:
JP32047187A
Publication Date:
February 28, 1991
Filing Date:
December 18, 1987
Export Citation:
Assignee:
JUNKOSHA CO LTD
International Classes:
F16L9/19; F16L37/00; F16L39/00