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| 81. | fill pit operation |
| 填坑开采法 |
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| 82. | primary pit field |
| 初生纹孔场 |
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| 83. | open pit development |
| 露天矿开拓 |
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| 84. | working pit edge |
| 工作帮 |
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| 85. | open pit incineratio |
| 露天坑式焚烧 |
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| 86. | sinkage dock pit |
| 沉坞坑 |
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| 87. | biogas generating pit |
| 沼气池 |
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| 88. | round storage pit |
| 圆形窖穴 |
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| 89. | half bordered pit |
| 半具缘纹孔 |
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| 90. | mountain pit-viper |
| 山铬铁头蛇 |
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