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发明名称
Hydraulic expander
摘要
申请公布号
US2955556(A)
申请公布日期
1960.10.11
申请号
US19570662860
申请日期
1957.05.31
申请人
WALLACE EXPANDING MACHINE, INC.
发明人
ROPER RALPH E.;FIKE EUGENE K.
分类号
B21D39/20
主分类号
B21D39/20
代理机构
代理人
主权项
地址
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