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摘要
申请公布号
US2340660(A)
申请公布日期
1944.02.01
申请号
US19430475046
申请日期
1943.02.06
申请人
HANSEN JACOB P
发明人
HANSEN JACOB P.
分类号
B44D3/12
主分类号
B44D3/12
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