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经营范围
发明名称
RISER INSTALLATION METHOD
摘要
申请公布号
US3503218(A)
申请公布日期
1970.03.31
申请号
USD3503218
申请日期
1966.02.17
申请人
BROWN & ROOT INC.
发明人
EDGAR R. BROADWAY;ROBERT B. MCLEOD
分类号
E21B43/01;(IPC1-7):E21B15/02;F16B1/00
主分类号
E21B43/01
代理机构
代理人
主权项
地址
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