CPC Subgroup
H01J 17/20 Selection of substances for gas fillings; Specified operating pressures or temperatures
Full Title
Gas-filled discharge tubes with solid cathode (H01J25/00, H01J27/00, H01J31/00 - H01J41/00 take precedence; gas filled spark gaps H01T; Marx converters H02M7/26) > Details > Selection of substances for gas fillings; Specified operating pressures or temperatures