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发明名称
Method of and apparatus for continuous welding of pipes and tubes
摘要
申请公布号
US2575381(A)
申请公布日期
1951.11.20
申请号
US19490084782
申请日期
1949.04.01
申请人
THE YOUNGSTOWN SHEET AND TUBE COMPANY
发明人
COLBY IRVING A.
分类号
B23K13/02
主分类号
B23K13/02
代理机构
代理人
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