rear plate

• 后板

rear plate的用法和样例：

例句

1. When the diaphragm of the speaker generates sound, the sound waves which are reflexed from the rear board will be sent out by the reflex pipes.
   当单体振膜发声时，其声音打到后板所反弹的声波，藉由反射导管将反相的声波传递出来。