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发明名称
Resonance device for inspecting materials
摘要
申请公布号
US2499459(A)
申请公布日期
1950.03.07
申请号
US19470777931
申请日期
1947.10.04
申请人
SPERRY PRODUCTS, INC.
发明人
CARLIN BENSON
分类号
G01N29/34
主分类号
G01N29/34
代理机构
代理人
主权项
地址
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