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1. | separable covering |
| 可分覆盖 |
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2. | universal covering |
| 通用覆盖 |
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3. | double covering |
| 重覆盖 |
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4. | normal covering |
| 正规覆盖 |
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5. | laminated covering |
| 薄片覆盖 |
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6. | covering factor |
| 覆盖因子 |
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7. | identical covering |
| 恒等覆盖 |
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8. | plastic covering |
| 覆盖塑料 |
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9. | finite covering |
| 有限覆盖 |
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10. | closed covering |
| 闭覆盖 |
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