 |
| |||
| 零输入; 无输入 | |||
| 零输人; 无输人 | |||
| 零 输入 | |||
| zero input: 7 phrases in 6 subjects |
| Aviation | 1 |
| Electric machinery | 2 |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
| Space | 1 |
| Technology | 1 |
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