 |
| |||
| recording density; tape density | |||
| packing density | |||
| density of record | |||
| writing density | |||
| 记录密度: 54 phrases in 13 subjects |
| Aviation | 3 |
| Drilling | 1 |
| Earth sciences | 1 |
| Electronics | 5 |
| Geophysics | 6 |
| Information technology | 4 |
| Metallurgy | 4 |
| Navigation | 1 |
| Oil / petroleum | 4 |
| Oil processing plants | 1 |
| Space | 8 |
| Technology | 14 |
| Telecommunications | 2 |