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发明名称
METHOD FOR EXTRACTING KEYWORD
摘要
申请公布号
JPH02158872(A)
申请公布日期
1990.06.19
申请号
JP19880313162
申请日期
1988.12.12
申请人
RICOH CO LTD
发明人
FUJITA KATSUHIKO
分类号
G06F17/30
主分类号
G06F17/30
代理机构
代理人
主权项
地址
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