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| 点火开关钥匙 | |||
| 互换电键 | |||
| 开关 | |||
| 转换开关; 电话电键 | |||
| switch key: 36 phrases in 10 subjects |
| Architecture | 2 |
| Automobiles | 8 |
| Electric machinery | 2 |
| Electronics | 3 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 1 |
| Rail transport | 6 |
| Space | 2 |
| Technology | 10 |
| Telecommunications | 1 |
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