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发明名称
Rail flaw detector mechanism
摘要
申请公布号
US2074741(A)
申请公布日期
1937.03.23
申请号
US19350010143
申请日期
1935.03.09
申请人
SPERRY PRODUCTS, INC.
发明人
DRAKE HARCOURT C.
分类号
G01N27/83
主分类号
G01N27/83
代理机构
代理人
主权项
地址
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