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经营范围
发明名称
Improvements in electric resistances
摘要
申请公布号
GB684547(A)
申请公布日期
1952.12.17
申请号
GB19510014725
申请日期
1951.06.21
申请人
STEATIT-MAGNESIA AKTIENGESELLSCHAFT
发明人
WEIDES ERICH
分类号
H01C7/04
主分类号
H01C7/04
代理机构
代理人
主权项
地址
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