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经营范围
发明名称
Procédé de fabrication de tubes et tubes obtenus par ce procédé
摘要
申请公布号
FR996496(A)
申请公布日期
1951.12.19
申请号
FRD996496
申请日期
1949.10.03
申请人
发明人
GUNNAR AXEL STROMBERG & RALPH ENGELBRE
分类号
B21C37/12;F16L9/16
主分类号
B21C37/12
代理机构
代理人
主权项
地址
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