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| 双凹的 (biconcavus) | |||
| 双凹的; 两面凹的 | |||
| 双凹面的; 双凹形; 双凹 (的); 双面凹的 | |||
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biconcave : 4 phrases in 3 subjects |
| Agriculture | 1 |
| Metallurgy | 1 |
| Technology | 2 |
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