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发明名称
DOOR BELL
摘要
申请公布号
GB8712850(D0)
申请公布日期
1987.07.08
申请号
GB19870012850
申请日期
1987.06.02
申请人
KORDE, S P
发明人
分类号
G08B1/08;G08B3/10;G10K1/08
主分类号
G08B1/08
代理机构
代理人
主权项
地址
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