multitone
| etching
| multitone | |
| gen. | 多频音 |
| energ.ind. | 多频声 |
| etching | |
| avia. од. | 刻蚀 |
| desert. | 刻蚀; 腐蚀 |
| oil | 浸蚀 |
| space | 腐蚀; 蚀刻 |
| steel. од. | 侵蚀 |
| |||
| 多频音 | |||
| 多频声 | |||
| 多频率声 | |||
|
multitone : 19 phrases in 6 subjects |
| Aviation | 1 |
| Construction | 1 |
| Electronics | 9 |
| Multimedia | 3 |
| Technology | 3 |
| Telecommunications | 2 |