tuning-fork
| frequency control
| tuning fork | |
| gen. | 音叉 |
| oil од. | 音叉 |
| frequency control | |
| hydroel.st. | 频率调节 |
| IT | 频率控制 |
| space | 频率控制 |
| |||
| 校速音叉 | |||
| ★ 音叉 | |||
| |||
| 音叉 | |||
|
tuning-fork : 17 phrases in 8 subjects |
| Aviation | 1 |
| Electronics | 3 |
| Nursing | 2 |
| Otorhinolaryngology | 1 |
| Pediatrics | 1 |
| Space | 2 |
| Technology | 6 |
| Telecommunications | 1 |