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摘要
申请公布号
US1980659(A)
申请公布日期
1934.11.13
申请号
US19320642188
申请日期
1932.11.11
申请人
JOHANNES BOLDT
发明人
BOLDT JOHANNES
分类号
B42D19/00
主分类号
B42D19/00
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