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发明名称
Improvements in valves for inflatable balls or other envelopes
摘要
申请公布号
GB643936(A)
申请公布日期
1950.09.27
申请号
GB19480014573
申请日期
1948.05.29
申请人
FRANK ALAN MIDDLETON
发明人
分类号
F16K15/20
主分类号
F16K15/20
代理机构
代理人
主权项
地址
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