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发明名称
Self-centering butterfly valve
摘要
申请公布号
US3159376(A)
申请公布日期
1964.12.01
申请号
US19610135302
申请日期
1961.08.31
申请人
RAY NICHOLAS M
发明人
RAY NICHOLAS M.
分类号
F16K1/24
主分类号
F16K1/24
代理机构
代理人
主权项
地址
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