场: a level open space; threshin ...发射: launch; radiate; project; di ...电子: electron微波管: microwave tube; microwave va ...尝射电子微波管: femitron场发射电子枪: field emission gun; field-emission gun场发射电子象: field emission electron image; field emission gun场发射电子显微镜: field emission electron microscope无场发射电流: field free emission current; field-free emission current零电场发射电流: zero field emission current发射电子: emission electron发射电子管: transmitter valve热发射电子: thermal electron阳电子微波加速器: positron microtron场致发射电子: field emission electrons; field emitted electron电子发射电流: electron emission current二次发射电子: secondary emission electron; secondary emission photocell发射电子能量: emitted electron energy发射电子物质: electron emissive material热发射电子管: thermionic tube微波管: microwave tube场发射: autoemission白炽热发射电子: bright emitter二次电子发射电极: secondary electron emitter发射电子扫描显: tsem