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| 71. | circumpolar star |
| 拱极星 |
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| 72. | double vault tunnel |
| 双拱隧道 |
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| 73. | double webbed plate arch |
| 双腹板拱 |
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| 74. | one-centered arch |
| 单心拱 |
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| 75. | four-hinged arch |
| 四铰拱 |
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| 76. | collapse-arch of surrounding rock |
| 围岩塌落拱 |
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| 77. | cinquefoil arch |
| 五瓣形拱 |
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| 78. | trimmer arch |
| (壁)炉前拱 |
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| 79. | maximum-pressure arch |
| 最大压力拱 |
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| 80. | high magnetic arcade (HMA) |
| 高磁拱 |
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