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发明名称
Manufacture of springs
摘要
申请公布号
US1975114(A)
申请公布日期
1934.10.02
申请号
US19310570505
申请日期
1931.10.22
申请人
GEORG MASING;OTTO DAHL
发明人
MASING GEORG;DAHL OTTO
分类号
C22F1/08
主分类号
C22F1/08
代理机构
代理人
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