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经营范围
发明名称
Process for manufacturing welded cast iron tubes by electrical resistance welding
摘要
申请公布号
US2834871(A)
申请公布日期
1958.05.13
申请号
US19520302342
申请日期
1952.08.02
申请人
BERG MANFRED V
发明人
BERG MANFRED V.
分类号
B23K11/16
主分类号
B23K11/16
代理机构
代理人
主权项
地址
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