primary access
| method
| primary access abbr. | |
| space | 一次群访问 |
| tech. | 直接存取 |
| method abbr. | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| 一次群访问 | |||
| 直接存取 | |||
| 基群速率接人; 主存取; 一次存取; 随机存取; —次检索; 随机检索 | |||
|
primary access : 14 phrases in 6 subjects |
| Aviation | 1 |
| Electronics | 5 |
| Information technology | 1 |
| Space | 2 |
| Technology | 2 |
| Telecommunications | 3 |