radial-beam tube

例句：

1. 1. The radial-beam tube is used to heat the room.
   辐射管用于加热房间。
2. 2. The radial-beam tube is an important component of the heating system.
   辐射管是供暖系统的一个重要组成部分。
3. 3. The radial-beam tube is designed to distribute heat evenly throughout the room.
   辐射管设计用来均匀地将热量分布在房间内。