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发明名称
Bell
摘要
申请公布号
US2322021(A)
申请公布日期
1943.06.15
申请号
US19420448218
申请日期
1942.06.24
申请人
THE PENNSYLVANIA RAILROAD COMPANY
发明人
HENGSTLER JOHN
分类号
G10K1/10
主分类号
G10K1/10
代理机构
代理人
主权项
地址
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