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摘要
申请公布号
US2364661(A)
申请公布日期
1944.12.12
申请号
US19420466468
申请日期
1942.11.21
申请人
E. W. BLISS COMPANY
发明人
RODE FREDRICH J.;HATCH MEREDITH R.
分类号
B21D24/12;B30B1/06
主分类号
B21D24/12
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