systems aging
| testing
| system aging | |
| busin. | 系统老化 |
| testing | |
| econ. | 检测 |
| fin. | 试査 |
| hydroel.st. | 检验; 试验; 检定 |
| met. | 研究; 测定 |
| mining. | 试油 |
| oil | 试井 |
| racing | 试车 |
| |||
| 系统老化 | |||
|
systems aging : 3 phrases in 2 subjects |
| Automobiles | 1 |
| Electronics | 2 |