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经营范围
发明名称
Valve seat
摘要
申请公布号
US1905638(A)
申请公布日期
1933.04.25
申请号
US19290414707
申请日期
1929.12.17
申请人
WALTER M. CHARMAN
发明人
HUSHOUR PERRY D.
分类号
F16K49/00
主分类号
F16K49/00
代理机构
代理人
主权项
地址
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