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经营范围
发明名称
Replaceable valve seat adapter
摘要
申请公布号
US2964758(A)
申请公布日期
1960.12.20
申请号
US19560588684
申请日期
1956.06.01
申请人
MICHAEL GRAZIOSI
发明人
GRAZIOSI MICHAEL
分类号
E03D1/34
主分类号
E03D1/34
代理机构
代理人
主权项
地址
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