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摘要
申请公布号
US1803726(A)
申请公布日期
1931.05.05
申请号
US19280306880
申请日期
1928.09.19
申请人
PFUDERER CARL A
发明人
PFUDERER CARL A.
分类号
B42D3/14
主分类号
B42D3/14
代理机构
代理人
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