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H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
H01J40/02—Details
H01J40/14—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
FR1117203D1954-11-231954-11-23Procédé électro optique à cellule photo résistante, applicable aux mécanismes compteurs de fluides
ExpiredFR1117203A
(fr)