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发明名称
Derrick
摘要
申请公布号
US2443306(A)
申请公布日期
1948.06.15
申请号
US19450605559
申请日期
1945.07.17
申请人
THE LUMMUS COMPANY
发明人
CUIR TALFORD S. DE
分类号
B66C23/60;E21B15/00
主分类号
B66C23/60
代理机构
代理人
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地址
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