ELECTRON GUN, PHOSPHOR, GETTER , TUNGSTEN HEATER FOR B/W PICTURE TUBE.
ELECTRON GUN, PHOSPHOR, GETTER , TUNGSTEN HEATER FOR B/W PICTURE TUBE.
黑白显像管用电子枪，荧光粉，吸气剂，钨加热子等。
ELECTRON GUN, PHOSPHOR, GETTER , TUNGSTEN HEATER FOR B/W PICTURE TUBE.
黑白显像管用电子枪，荧光粉，吸气剂，钨加热子等。