field emission array electron source
grid bias
栅
栅偏压
栅极偏压
栅极偏电压
栅偏[电]压
栅极电压
相偏压调变
(75)Se radiographic source
~(192)Ir radiation source
~(241)Am smoke detector source
~(241)Am-Be neutron source
~(241)Am-Be neutron source element
~(252)Cf neutron source
~(252)Cf 中子源
~(252)Cf中子源
252Cf中子源
~(75)Se radiographic source