The Audion became the key component of all radio, telephone, radar, television, and computer systems before the invention of the transistor.
在晶体管(transistor)发明以前，三极检波管是所有收音机、电话、电视机和计算机系统的基本组件。
The visible telephone and visible doorbell have wide application and bright prospects. The electron gun is one of the key components of the picture tube for visible systems.
可视电话、可视门铃具有广阔的发展前景，其显像管电子枪属于关键部件。
The visible telephone and visible doorbell have wide application and bright prospects. The electron gun is one of the key components of the picture tube for visible systems.
可视电话、可视门铃具有广阔的发展前景，其显像管电子枪属于关键部件。
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