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发明名称
Installation tool for check valve assembly
摘要
申请公布号
US2931679(A)
申请公布日期
1960.04.05
申请号
US19570675862
申请日期
1957.08.02
申请人
SHELNER ROBERT J
发明人
SHELNER ROBERT J.
分类号
E21B23/00
主分类号
E21B23/00
代理机构
代理人
主权项
地址
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