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经营范围
发明名称
Procédé de fabrication de tuyaux en fer forgé à ailettes circulaires
摘要
申请公布号
FR746989(A)
申请公布日期
1933.06.09
申请号
FRD746989
申请日期
1932.12.06
申请人
发明人
HELLENBROICH WILHELM JOSEF
分类号
B21C37/24
主分类号
B21C37/24
代理机构
代理人
主权项
地址
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