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申请公布号
BE445734(A)
申请公布日期
1942.06.30
申请号
BED445734
申请日期
1942.05.29
申请人
发明人
分类号
B04C5/00;B04C5/04;B04C5/081;F02M35/022
主分类号
B04C5/00
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