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发明名称
Tube expander
摘要
申请公布号
US2448512(A)
申请公布日期
1948.09.07
申请号
US19470720780
申请日期
1947.01.08
申请人
NEWELL BRACKETT
发明人
BRACKETT NEWELL
分类号
B21D39/10
主分类号
B21D39/10
代理机构
代理人
主权项
地址
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