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81. | covering theorem |
| 覆盖定理 |
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82. | covering homotopy |
| 覆盖同伦 |
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83. | covering manifold |
| 覆盖廖 |
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84. | grammar covering |
| 文法覆盖 |
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85. | covering mortar |
| 覆盖灰浆 |
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86. | covering shovel |
| 覆土器|覆土铲|培土松土铲 |
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87. | covering operation |
| 覆盖运算 |
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88. | fabric covering |
| 用胶布作成的外壳 |
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89. | covering roller |
| 覆土压土轮 |
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90. | primordial covering |
| 原包被 |
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