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发明名称
Tube expander
摘要
申请公布号
US2215949(A)
申请公布日期
1940.09.24
申请号
US19390261482
申请日期
1939.03.13
申请人
FRANK YOCHEM;BODINE CLARENCE E
发明人
YOCHEM FRANK;BODINE CLARENCE E.
分类号
B21D39/06
主分类号
B21D39/06
代理机构
代理人
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