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发明名称
An improved device to enable a person to breathe whilst on or under the surface of water
摘要
申请公布号
GB477610(A)
申请公布日期
1938.01.03
申请号
GB19360015392
申请日期
1936.06.02
申请人
PERCY NICHOLSON
发明人
分类号
B63C11/16
主分类号
B63C11/16
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代理人
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