| |||
| 面板型自动交换机 | |||
|
panel type : 57 phrases in 12 subjects |
| Architecture | 3 |
| Automobiles | 2 |
| Electric machinery | 1 |
| Electricity | 1 |
| Electronics | 1 |
| Exhibitions | 1 |
| Hydroelectric power stations | 2 |
| Management | 3 |
| Metallurgy | 1 |
| Refrigeration | 2 |
| Scientific | 1 |
| Technology | 39 |
| |||
| 面板型自动交换机 | |||
|
panel type : 57 phrases in 12 subjects |
| Architecture | 3 |
| Automobiles | 2 |
| Electric machinery | 1 |
| Electricity | 1 |
| Electronics | 1 |
| Exhibitions | 1 |
| Hydroelectric power stations | 2 |
| Management | 3 |
| Metallurgy | 1 |
| Refrigeration | 2 |
| Scientific | 1 |
| Technology | 39 |