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发明名称
PROCESS FOR MAKING ELECTRICAL CONTACT BRUSHES
摘要
申请公布号
CA540342(A)
申请公布日期
1957.04.30
申请号
CAD540342
申请日期
申请人
UNION CARBIDE CANADA LIMITED
发明人
DIMITER RAMADANOFF
分类号
主分类号
代理机构
代理人
主权项
地址
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