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发明名称
Conduit plugging device
摘要
申请公布号
US2857933(A)
申请公布日期
1958.10.28
申请号
US19570638982
申请日期
1957.02.08
申请人
GEORGE LITHUN
发明人
LITHUN GEORGE
分类号
F16K7/10
主分类号
F16K7/10
代理机构
代理人
主权项
地址
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