chronotron
... chronoscopy测时术 chronotron摆线管 chrostorvariable-colourfilter变色龙滤色镜 ...
chrochtron
... chro-mow克罗莫铬钼钨钢 chrochtron摆线管 Chrogo克娄勾牙医用合金 ...
[电子] trochotron
... tri-tet 三极四极管 trochotron 摆线管 troposcatter 对流层散射 ...
trochotron