vacuum bulb造句

例句与造句

1. :: : Those early vacuum bulbs were a popular plot point in old movies.
2. In another failure mode, a tiny puncture of the arc tube leaks some of the sodium vapor into the outer vacuum bulb.
3. In 1841, Frederick de Moleyns of England was granted the first patent for an incandescent lamp, with a design using platinum wires contained within a vacuum bulb.
4. Hammer found that under certain conditions of vacuum and voltage he observed a blue glow around the positive pole in a vacuum bulb and a blackening of the wire and the inside of the glass bulb at the positive pole.
5. It's difficult to find vacuum bulb in a sentence. 用vacuum bulb造句挺难的