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| 31. | continuous bucket dredge |
| 多斗挖掘船 |
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| 32. | tap production potential |
| 挖掘生产潜力 |
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| 33. | Excavate an archaeological site. |
| 挖掘考古现场 |
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| 34. | dredge stripping |
| 挖掘船剥离 |
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| 35. | belled excavation |
| 钟形挖掘 |
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| 36. | bench excavation |
| 台阶式挖掘 |
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| 37. | complete set of hydraulic excavator |
| 水力挖掘机组 |
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| 38. | sea-going dredge |
| 海洋挖掘船 |
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| 39. | braced excavation |
| 支撑式挖掘 |
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| 40. | depth of vertically digging |
| 垂直挖掘深度 |
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