单词	sack elevator
释义	sack elevator 袋式升降机
随便看	photo cathode Photo cathode photo-cathode photocathode effective diameter photocathode efficiency photocathode focus voltage photocathode illumination photo-cathode light flux photocathode luminous sensitivity Photocathode material photocathode phosphor image intensifier photocathode-phosphor image intensifier photocathode protection photocathode radiant sensitivity photocathode resistance photocathode resp photocathode respon photocathode response photocathode responsibility photocathode responsivity Photocathode RF gun photocathodes Photocathodes photocathode sensitivity photo cathode sensitivity