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发明名称
Braille printing plate
摘要
申请公布号
US4859094(A)
申请公布日期
1989.08.22
申请号
US19870128380
申请日期
1987.12.03
申请人
OKADA, CHOZO
发明人
OKADA, CHOZO
分类号
G09B21/02
主分类号
G09B21/02
代理机构
代理人
主权项
地址
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