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| 41. | bench excavation |
| 台阶式挖掘 |
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| 42. | vertical extent |
| 深度 |
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| 43. | Of or relating to the great depths of the oceans. |
| 海洋深度的海洋深度的或与海洋深度有关的 |
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| 44. | sea-going dredge |
| 海洋挖掘船 |
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| 45. | Excavate an archaeological site. |
| 挖掘考古现场 |
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| 46. | braced excavation |
| 支撑式挖掘 |
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| 47. | belled excavation |
| 钟形挖掘 |
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| 48. | continuous bucket dredge |
| 多斗挖掘船 |
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| 49. | complete set of hydraulic excavator |
| 水力挖掘机组 |
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| 50. | dredge stripping |
| 挖掘船剥离 |
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