| |||
| 弹簧开关 | |||
| 弹簧转辙器; 弹簧道岔 | |||
|
spring switch : 11 phrases in 5 subjects |
| Aviation | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Space | 3 |
| Technology | 5 |
| |||
| 弹簧开关 | |||
| 弹簧转辙器; 弹簧道岔 | |||
|
spring switch : 11 phrases in 5 subjects |
| Aviation | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Space | 3 |
| Technology | 5 |