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| 挑料口; 扇形孔; 放射状环形钻孔 | |||
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| 扇形炮孔 | |||
| ring hole: 12 phrases in 5 subjects |
| Compressors | 1 |
| Explosives and Explosive Ordnance Disposal | 6 |
| Solar power | 1 |
| Technology | 3 |
| Textile industry | 1 |
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