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发明名称
METHOD AND MEANS FOR GUIDING, FLOATING AND CEMENTING WELL CASING IN BORED HOLES
摘要
申请公布号
CA545581(A)
申请公布日期
1957.08.27
申请号
CAD545581
申请日期
申请人
LAURENCE L. RECTOR
发明人
SYLVESTER B. SCHNITTER
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主分类号
代理机构
代理人
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