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发明名称
Float valve
摘要
申请公布号
US2223509(A)
申请公布日期
1940.12.03
申请号
US19390275544
申请日期
1939.05.24
申请人
BRAUER LEO F
发明人
BRAUER LEO F.
分类号
E21B21/10
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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