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经营范围
发明名称
TELESIGNALLING DEVICE
摘要
申请公布号
PL131956(B1)
申请公布日期
1985.01.31
申请号
PL19810230348
申请日期
1981.03.25
申请人
发明人
分类号
G08B;G08B9/04;G08C15/00;(IPC1-7):G08B9/04
主分类号
G08B
代理机构
代理人
主权项
地址
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