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摘要
申请公布号
US2048672(A)
申请公布日期
1936.07.28
申请号
US19310539787
申请日期
1931.05.25
申请人
CARL O. NORDENSSON
发明人
BROWN JAMES W.
分类号
G10K1/066
主分类号
G10K1/066
代理机构
代理人
主权项
地址
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