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经营范围
发明名称
Centrifugally expansible valve ring
摘要
申请公布号
US2555542(A)
申请公布日期
1951.06.05
申请号
US19470721494
申请日期
1947.01.11
申请人
INTERNATIONAL HARVESTER COMPANY
发明人
JR. OTTO E. HINTZ,
分类号
B04B15/06
主分类号
B04B15/06
代理机构
代理人
主权项
地址
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