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Document Type and Number:
Japanese Patent JPH028287
Kind Code:
B2
Inventors:
OOTSUKA KAZUHIKO
NOKAI KOJI
Application Number:
JP25114587A
Publication Date:
February 23, 1990
Filing Date:
October 05, 1987
Export Citation:
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Assignee:
NITTA KK
International Classes:
G02C7/16; G02C3/02



 
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