 |
| 母 管: 79 phrases in 15 subjects |
| Business | 1 |
| Chemistry | 1 |
| Computer networks | 1 |
| Construction | 1 |
| Drilling | 1 |
| Electronics | 30 |
| Food service and catering | 1 |
| General | 16 |
| Law | 1 |
| Medical | 6 |
| Nuclear and fusion power | 1 |
| Oil processing plants | 1 |
| Technology | 15 |
| Weapons and gunsmithing | 1 |
| Zoology | 2 |