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发明名称
Perfectionnements aux appareils détecteurs de fissures ou d'autres défauts dans les rails
摘要
申请公布号
FR721202(A)
申请公布日期
1932.03.01
申请号
FRD721202
申请日期
1931.08.10
申请人
SPERRY PRODUCTS INC.
发明人
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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