| 1. | They can be used in devices for which vacuum tube valves were unsuitable, such as in hearing aids designed to fit into the ear .
它们能用在不宜采用真空管的装置上，例如能用在放在耳朵内的助听器里。 |
| 2. | Vacuum tubes require dc voltage sources as well
真空电子管也要求以直流电压为电源。 |
| 3. | All glass vacuum tube full glass al - n - al vacuum tube
全玻璃真空管全玻璃铝氮铝真空管 |
| 4. | Used as frame of vacuum tube , heating elements
W1 w2 ：用于制造电子管栅极边杆，加热元件等。 |
| 5. | Lee de forest invents the vacuum tube
李.德福雷斯特发明电子管。 |
| 6. | A specific vacuum tube which converts light into electrical energy
把光转换成电能的一种真空管。 |
| 7. | Not any air gets into the vacuum tube
没有空气能进入真空管。 |
| 8. | Slide - back vacuum tube voltmeter
偏压补偿式电子管伏特计 |
| 9. | The ancestor of these miniature electronic devices is the vacuum tube
这些微型电子装置的鼻祖就是真空管。 |
| 10. | All glass vacuum tubes are the key component of solar collectors
全玻璃真空管是太阳能集热器中的关键部分。 |
