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发明名称
Safety cracker
摘要
申请公布号
US1809825(A)
申请公布日期
1931.06.16
申请号
US19300500589
申请日期
1930.12.06
申请人
BARNER HAROLD S
发明人
BARNER HAROLD S.
分类号
F42B4/04
主分类号
F42B4/04
代理机构
代理人
主权项
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