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发明名称
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摘要
申请公布号
US2005497(A)
申请公布日期
1935.06.18
申请号
US19340704837
申请日期
1934.01.02
申请人
MORRIS FALK
发明人
FALK MORRIS
分类号
B21D53/42;E05B19/10
主分类号
B21D53/42
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