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发明名称
Bookbinding
摘要
申请公布号
US2121505(A)
申请公布日期
1938.06.21
申请号
US19370137137
申请日期
1937.04.15
申请人
MARTLING HARVEY B
发明人
MARTLING HARVEY B.
分类号
B42D1/06
主分类号
B42D1/06
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