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发明名称
Method and apparatus for welding pipe
摘要
申请公布号
US2463907(A)
申请公布日期
1949.03.08
申请号
US19440564822
申请日期
1944.11.23
申请人
DRESSER INDUSTRIES, INC.
发明人
RISLEY ROGER E.;SCHARF PAUL B.
分类号
B23K9/028
主分类号
B23K9/028
代理机构
代理人
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