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发明名称
Drill collar laydown wagon
摘要
申请公布号
US2705645(A)
申请公布日期
1955.04.05
申请号
US19500192431
申请日期
1950.10.27
申请人
ADAMS TRAVIS B
发明人
ADAMS TRAVIS B.
分类号
E21B19/15
主分类号
E21B19/15
代理机构
代理人
主权项
地址
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