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经营范围
发明名称
Discharge tube
摘要
申请公布号
US1936514(A)
申请公布日期
1933.11.21
申请号
US19280320976
申请日期
1928.11.21
申请人
LENGNICK TOMAS C
发明人
LENGNICK TOMAS C.
分类号
G02B23/12;H01J31/50
主分类号
G02B23/12
代理机构
代理人
主权项
地址
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