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| 61. | a covering or cover. |
| 覆盖物或盖子 |
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| 62. | unramified covering surface |
| 非分歧覆盖曲面 |
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| 63. | An outer covering or layer. |
| 覆盖物外部的覆盖物或层次 |
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| 64. | minimal set of covering vertexes |
| 极小覆盖顶点集 |
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| 65. | locally finite open covering |
| 局部有限开覆盖 |
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| 66. | refinement of a covering |
| 覆盖的加细 |
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| 67. | A covering; a shelter. |
| 覆盖物；掩蔽处 |
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| 68. | covering like an arched roof |
| 拱券状覆盖物 |
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| 69. | simply connected covering group |
| 单连通覆盖群 |
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| 70. | rubber compound for roof covering |
| 屋顶覆盖橡胶板材 |
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