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发明名称
Ball valve lifting apparatus
摘要
申请公布号
US3117323(A)
申请公布日期
1964.01.14
申请号
US19620167847
申请日期
1962.01.22
申请人
CORSAW HARRY B
发明人
CORSAW HARRY B.
分类号
E03C1/23;E03D1/34
主分类号
E03C1/23
代理机构
代理人
主权项
地址
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