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发明名称
Improvements in conductors batons
摘要
申请公布号
GB642138(A)
申请公布日期
1950.08.30
申请号
GB19470021981
申请日期
1947.08.08
申请人
JOHN GOULD
发明人
分类号
G10G7/00
主分类号
G10G7/00
代理机构
代理人
主权项
地址
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