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| 孔 (こう); 穴 (ana); ウェル; ポート (pōto); オープニング | |||
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孔 : 489 phrases in 8 subjects |
| Accumulators | 1 |
| Electric machinery | 3 |
| Electronics | 6 |
| Isolation | 1 |
| Nuclear physics | 1 |
| Technology | 473 |
| Thermal Energy | 3 |
| Video recording | 1 |
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