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| 41. | working pit edge |
| 工作帮 |
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| 42. | open pit incineratio |
| 露天坑式焚烧 |
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| 43. | biogas generating pit |
| 沼气池 |
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| 44. | mud setting pit |
| 泥浆沉淀槽 |
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| 45. | half bordered pit |
| 半具缘纹孔 |
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| 46. | round storage pit |
| 圆形窖穴 |
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| 47. | sinkage dock pit |
| 沉坞坑 |
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| 48. | mountain pit-viper |
| 山铬铁头蛇 |
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| 49. | fill pit operation |
| 填坑开采法 |
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| 50. | smooth pit peach |
| 光核桃 |
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