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- 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。
- Every transistor has at least three electrodes. 每个晶体管至少有三个电极。
- A specific vacuum tube which converts light into electrical energy. 把光转换成电能的一种真空管。
- Discussions are conducted on GD type three electrode duster system and the commonly seen troubles in operation and some improvements are put forward. 论述了GD型三电极电除尘器的系统及设备运行中的常见故障及进一步完善的措施。
- 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。
- 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。
- Vacuum tubes require DC voltage sources as well. 真空电子管也要求以直流电压为电源。
- 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。
- A transistor has three electrodes, the emitter, the base and the collector. 晶体管有三个电极，即发射极，基极和集电极。（电子）
- 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。
- consumable electrode vacuum arc furnace 自耗电极真空电弧炉
- consumable electrode vacuum furnace 真空自耗炉
- 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。
- An active semiconductor device with three electrodes that may be either an amplifier or a switch. 一种有源半导体器件,有三个电极,可以是放大器或开关。
