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- vacuum tube hearing aid 真空管助听器
- 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。
- I got my hearing aid on the National Health (Service). 我的助听器是国民保健署资助的。
- 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.
- A hearing aid helps to overcome defects in hearing. 助听器有助于克服听觉缺陷。
- 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。
- Ask client to remove hearing aid and close eyes. 嘱受检者取下助听器,闭眼。
- An electron tube or a vacuum tube. 电子管或真空管。
- A hearing aid helps most people to hear better. 助听器有什么用?
- Lee de Forest invents the vacuum tube. 李.;德福雷斯特发明电子管。
- She adjusted the power on her hearing aid. 她调了调助听器的电流量。
- Hearing Aid Industry experience is preferred. 有助听器行业经验优先考虑。
- A. Ask client to remove hearing aid and close eyes. 嘱受检者取下助听器，闭眼。
- How to improve the effects of hearing aid properly? 如何更好地发挥助听器的作用?
- 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。
- They decided to “yoke” the old man with the hearing aid. 他们决定抢劫那个带助听器的老头。
- 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。
