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- Vacuum tubes require DC voltage sources as well. 真空电子管也要求以直流电压为电源。
- Diangong Heat tube Vacuum tube heat collector. 电工太阳能热管真空管集热器.
- Diangong Solar vacuum tube heat collector. 电工太阳能真空管集热器.
- Not any air gets into the vacuum tube. 没有空气能进入真空管。
- John Ambrose Fleming invents the vacuum tube. 1904年的今天，约翰·安布鲁斯·弗莱明发明了真空管。
- An electron tube or a vacuum tube. 电子管或真空管。
- Lee de Forest invents the vacuum tube. 李.;德福雷斯特发明电子管。
- 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。
- A specific vacuum tube which converts light into electrical energy. 把光转换成电能的一种真空管。
- Heat resistance soft vacuum tube avoids damage by hot nozzle. 防热真空软管,免被热吸咀误损。
- Battery used to maintain the grid potential in a vacuum tube. 能够保持潜藏在真空管内的栅格的电池。
- In semiconductor receivers transistors take the place of vacuum tubes. 在半导体收音机中晶体管代替了真空管。
- These silicon switches were much smaller than the vacuum tubes used in early circuitry. 这些硅晶开关比用于早期电路的真空管要小得多。
- Vacuum tube amplifiers used the first time in coast-to-coast telco circuits. 真空管放大器首次用于大西洋岸至太平洋岸的电信电路中。
- ENIAC weighs 30 tons and is 100 feet long, 8 feet high, and contains 17,468 vacuum tubes. ENIAC重30吨，长100英尺，高8英尺，拥有17,468根真空管。
- 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。
- Or to reduce cost, add bassoon span of purpose, reduce vacuum tube amount. 或者为了降低成本，有意增大管间距，减少真空管数量。
- Old equipment had not only such large components as vacuum tubes,but also the wires which joined the parts together. 旧式设备不但有像电子管这样的大元件，而且还有把这些元件连在一起的导线。
- The first electronic computer used vacuum tubes and other components, and this made the equipment very large and bulky. 第一批电子计算机使用真空管和其他元件，这使得设备又大又笨。
- All kinds of electronic equipment which could in principle use vacuum tubes can be made much better and more reliable with trasistors. 各种电子设备原则上都可使用电子管，但如果使用晶体管，那就要好得多，并且更可靠。
