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摘要
申请公布号
US1805268(A)
申请公布日期
1931.05.12
申请号
US19300459159
申请日期
1930.06.04
申请人
TRESBACK LOUIS F
发明人
TRESBACK LOUIS F.
分类号
B42F13/12
主分类号
B42F13/12
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