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发明名称
Materials specimen marking device
摘要
申请公布号
US2424338(A)
申请公布日期
1947.07.22
申请号
US19430507761
申请日期
1943.10.26
申请人
THE BALDWIN LOCOMOTIVE WORKS
发明人
SONNTAG ALFRED
分类号
主分类号
代理机构
代理人
主权项
地址
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