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发明名称
Method of lapping valve plugs
摘要
申请公布号
US2268723(A)
申请公布日期
1942.01.06
申请号
US19380239905
申请日期
1938.11.12
申请人
MERCO NORDSTROM VALVE COMPANY
发明人
SCHERER GEORGE F.
分类号
B24B15/08
主分类号
B24B15/08
代理机构
代理人
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地址
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