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发明名称
PERPETUAL CALENDAR DISC SET
摘要
申请公布号
GB8915537(D0)
申请公布日期
1989.08.23
申请号
GB19890015537
申请日期
1989.07.06
申请人
JUANG, MING J
发明人
分类号
G09D3/08
主分类号
G09D3/08
代理机构
代理人
主权项
地址
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