| Subject | English | Chinese |
| space | discrete tone/multifrequency code | 离散音/多频码 |
| telecom. | multifrequency code | 多频编码 |
| geophys. | multifrequency code | 多频码 |
| telecom. | multifrequency code | 多频编码信令 |
| el. | multifrequency code oscillator | 多频编码振荡器 |
| telecom. | multifrequency code sender and receiver | 多频码发送器和收码器 |
| el. | multifrequency code signaling | 多频编码信令 |
| telecom. | multifrequency code signaling | MFC 信令 (MFC signaling) |
| telecom. | multifrequency code signaling | 多频编码信令 (MFC signaling) |
| tech. | multifrequency code signaling | 多频率编码信号方式 |
| tech. | multifrequency code signalling | 多频率编码信号方式 |
| el. | multifrequency code unit | 多频编码单元 |
