vacuum tube, support for emissive material
放射氦等离子体检测器
emissive helium-plasma detector
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相关词条
monochromatic emissive power
photo-emissive cathode, secondary emission cathode
discharge tube, photoelectric with photo-emissive cathode
emissive
secondary emissive materials discharge tube
vacuum tube, insulating layer located between heater and emissive material
monochromatic emissive power