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发明名称
Shaft extension plug for pipes
摘要
申请公布号
US3173449(A)
申请公布日期
1965.03.16
申请号
US19630279085
申请日期
1963.05.09
申请人
CUSTER
发明人
CUSTER DONALD J.;LONG ADRIAN L.
分类号
E03F7/02
主分类号
E03F7/02
代理机构
代理人
主权项
地址
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