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发明名称
Système de commutation
摘要
申请公布号
FR991340(A)
申请公布日期
1951.10.18
申请号
FRD991340
申请日期
1949.07.25
申请人
发明人
MODEE GUSTAF VILHELM GUNNAR;STRANDLUND JONAS HARRY;EK FOLKE
分类号
C03B13/12;H01J29/43;H01J31/36;H04Q3/00
主分类号
C03B13/12
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代理人
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