 |
| |||
| 莫尔斯式电码的; 点划线; 一点一划相间的 | |||
|
dot and dash : 16 phrases in 8 subjects |
| Architecture | 1 |
| Desert science | 1 |
| Drilling | 2 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Skydiving | 1 |
| Technology | 6 |
| Telecommunications | 1 |
|
| |||
| 莫尔斯式电码的; 点划线; 一点一划相间的 | |||
|
dot and dash : 16 phrases in 8 subjects |
| Architecture | 1 |
| Desert science | 1 |
| Drilling | 2 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Skydiving | 1 |
| Technology | 6 |
| Telecommunications | 1 |