A body from which rays are sent out.

辐射体。

In heating systems, a set of pipes, heated by some medium, as steam, for radiating heat.

(暖气系统之)散热器。

Device for cooling, as engines, by transferring heat from circulating water to the outer air.

(引擎之)冷却器。

A portion of any transmitting antenna capable of producing radio-frequency energy.

【无线】发射天线。