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发明名称
Apparatus for determining the degree of fatigue in drill pipe and the like
摘要
申请公布号
US2281163(A)
申请公布日期
1942.04.28
申请号
US19400346330
申请日期
1940.07.19
申请人
LANE EDWARD K
发明人
LANE EDWARD K.
分类号
G01N3/32
主分类号
G01N3/32
代理机构
代理人
主权项
地址
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