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发明名称
Method and apparatus for the production of welded tubing
摘要
申请公布号
US2669639(A)
申请公布日期
1954.02.16
申请号
US19520274249
申请日期
1952.02.29
申请人
TRENT TUBE COMPANY
发明人
BOWMAN HOWARD J.
分类号
B23K9/025
主分类号
B23K9/025
代理机构
代理人
主权项
地址
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