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发明名称
Buoyancy device
摘要
申请公布号
US2223880(A)
申请公布日期
1940.12.03
申请号
US19380225051
申请日期
1938.08.15
申请人
THOMAS ARDERN ARTHUR
发明人
ARDERN ARTHUR THOMAS
分类号
B63C9/105;B63C9/115
主分类号
B63C9/105
代理机构
代理人
主权项
地址
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