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发明名称
Tube expander
摘要
申请公布号
US2155416(A)
申请公布日期
1939.04.25
申请号
US19380196898
申请日期
1938.03.19
申请人
GEYER GEORGE A
发明人
GEYER GEORGE A.
分类号
B21D39/06
主分类号
B21D39/06
代理机构
代理人
主权项
地址
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