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发明名称
Audible message sign
摘要
申请公布号
GB0100200(D0)
申请公布日期
2001.02.14
申请号
GB20010000200
申请日期
2001.01.05
申请人
PLASTISIGN LIMITED
发明人
分类号
G09B21/00
主分类号
G09B21/00
代理机构
代理人
主权项
地址
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