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发明名称
Expanding pipe plug
摘要
申请公布号
US2154498(A)
申请公布日期
1939.04.18
申请号
US19380209055
申请日期
1938.05.20
申请人
EAGER OSCAR W
发明人
EAGER OSCAR W.
分类号
F16L55/132
主分类号
F16L55/132
代理机构
代理人
主权项
地址
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