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发明名称
Arrow
摘要
申请公布号
US2182951(A)
申请公布日期
1939.12.12
申请号
US19390249016
申请日期
1939.01.03
申请人
SWEETLAND WILLIAM E
发明人
SWEETLAND WILLIAM E.
分类号
F42B6/04
主分类号
F42B6/04
代理机构
代理人
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