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发明名称
Method of making round compound metallic articles
摘要
申请公布号
US2177435(A)
申请公布日期
1939.10.24
申请号
US19360105604
申请日期
1936.10.14
申请人
FR. KAMMERER A.-G.
发明人
KRETZ HANS
分类号
B23K20/00
主分类号
B23K20/00
代理机构
代理人
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