| 1. | No vacuum or picture tubes were broken .
真空管或显影管都未破碎。 |
| 2. | Transistors have many advantages over the old-fashioned vacuumtube valves .
与老式真空管相比，晶体管具有许多优点。 |
| 3. | 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。 |
| 4. | Manufacturing and sales of piping joints and valves
配管接口及真空管的制造销售 |
| 5. | Ol , gvt box ecc88 6dj8 siemens , wg . ,
6sl7gt美国sylvania厂制,黑屏1960年代古典真空管 |
| 6. | Vacuum technology high vacuum collars . dimensions
真空技术.高真空管颈.尺寸 |
| 7. | 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 |
| 8. | Vacuum technology . steel tubes for vacuum pipes . dimensions
真空技术.真空管道用钢管.尺寸 |
| 9. | Model : sjk - sc180 - 18 ub model : sjk - sc0185 - 12 cb
热管式真空管集热器 |
| 10. | A specific vacuum tube which converts light into electrical energy
把光转换成电能的一种真空管。 |
