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| concentric lamina (lamina concentrica); concentric layer | |||
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同心层 : 14 phrases in 8 subjects |
| Dermatology | 1 |
| Electric machinery | 1 |
| General | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Polymers | 1 |
| Technology | 5 |
| Telecommunications | 2 |
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