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发明名称
Portable derrick with telescoping fluid transmission lines
摘要
申请公布号
US3073396(A)
申请公布日期
1963.01.15
申请号
US19610102458
申请日期
1961.04.12
申请人
HOLAN CORPORATION
发明人
ECKELS GEORGE H.
分类号
B66C13/18;E21B19/087
主分类号
B66C13/18
代理机构
代理人
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地址
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