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| 21. | maintenance pit |
| 维修坑 |
|
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| 22. | jumping pit |
| 沙坑 |
|
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| 23. | conversation pit |
| 谈话间（指客厅等内供谈话用的专设场所） |
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| 24. | pit temperature |
| 泥浆池中泥浆温度 |
|
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| 25. | dislocation pit |
| 位错坑 |
|
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| 26. | orchestra pit |
| 乐池 |
|
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| 27. | prospecting pit |
| 勘探试坑 |
|
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| 28. | evaporation pit |
| 蒸发坑 |
|
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| 29. | molding pit |
| 铸模地坑 |
|
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| 30. | pit thermometer |
| 农用温度计 |
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