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发明名称
Apparatus for electrically welding spiral tubing
摘要
申请公布号
US2431743(A)
申请公布日期
1947.12.02
申请号
US19430503047
申请日期
1943.09.20
申请人
CHICAGO METAL HOSE CORPORATION
发明人
FENTRESS DAVID WENDELL
分类号
B23K11/08
主分类号
B23K11/08
代理机构
代理人
主权项
地址
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