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经营范围
发明名称
UNDERGROUND SEALING
摘要
申请公布号
US3436919(A)
申请公布日期
1969.04.08
申请号
USD3436919
申请日期
1966.05.09
申请人
CONTINENTAL OIL CO.
发明人
D'ARCY A. SHOCK;JOHN D. SUDBURY
分类号
E02D19/14;E02D27/38;E04H7/02;E21D1/12;E21F17/00;F17C3/00;(IPC1-7):B65G5/00;E21F17/16
主分类号
E02D19/14
代理机构
代理人
主权项
地址
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