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71. | canvas covering |
| 帆布罩 |
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72. | volatile covering |
| 挥发性覆盖层;造气的焊皮 |
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73. | Roof covering |
| 屋顶包皮 |
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74. | Book covering machine |
| 包封皮机 |
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75. | stressed covering |
| 受力蒙皮 |
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76. | regular covering |
| 正则覆盖 |
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77. | similar covering |
| 相似覆盖 |
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78. | covering space |
| 复叠空间 |
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79. | scattered covering |
| 散布覆盖 |
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80. | uniformizing covering surface |
| 单值化覆盖面 |
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