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经营范围
发明名称
Perforating apparatus
摘要
申请公布号
US2338327(A)
申请公布日期
1944.01.04
申请号
US19420466554
申请日期
1942.11.23
申请人
UNITED STATES GYPSUM COMPANY
发明人
HAEGELE OTTO P.
分类号
B28B11/12
主分类号
B28B11/12
代理机构
代理人
主权项
地址
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