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发明名称
Rail flaw detector mechanism
摘要
申请公布号
US2077812(A)
申请公布日期
1937.04.20
申请号
US19350010142
申请日期
1935.03.09
申请人
SPERRY PRODUCTS, INC.
发明人
SPERRY EDWARD G.;DRAKE HARCOURT C.
分类号
B61K9/10
主分类号
B61K9/10
代理机构
代理人
主权项
地址
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