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发明名称
Method and device for manufacturing helically formed tubes
摘要
申请公布号
US3139850(A)
申请公布日期
1964.07.07
申请号
US19610085149
申请日期
1961.01.26
申请人
INTERCONTINENTAL ENTERPRISES
发明人
WIEGEL EDUARD
分类号
B21C37/12
主分类号
B21C37/12
代理机构
代理人
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地址
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