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。
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。
They can be used in devices for which vacuum tube valves were unsuitable, such as in hearing AIDS designed to fit into the ear.
应用推荐