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发明名称
Method and apparatus for detecting permeable bodies
摘要
申请公布号
US2483417(A)
申请公布日期
1949.10.04
申请号
US19410416205
申请日期
1941.10.23
申请人
JOHNSON ELLIS A
发明人
JOHNSON ELLIS A.
分类号
G01V3/165
主分类号
G01V3/165
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代理人
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