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发明名称
Process for sealing mains
摘要
申请公布号
US3265782(A)
申请公布日期
1966.08.09
申请号
US19650427638
申请日期
1965.01.25
申请人
ROSENGARTEN
发明人
JR. WALTER E. ROSENGARTEN,;FLOWER ARCHIBALD T.;BUCHANAN DAVID L.
分类号
F16L55/178
主分类号
F16L55/178
代理机构
代理人
主权项
地址
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