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| 41. | dredge stripping |
| 挖掘船剥离 |
|
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| 42. | belled excavation |
| 钟形挖掘 |
|
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| 43. | complete set of hydraulic excavator |
| 水力挖掘机组 |
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| 44. | dig with a pick |
| 用镐挖掘 |
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| 45. | braced excavation |
| 支撑式挖掘 |
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| 46. | sea-going dredge |
| 海洋挖掘船 |
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| 47. | bench excavation |
| 台阶式挖掘 |
|
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| 48. | depth of vertically digging |
| 垂直挖掘深度 |
|
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| 49. | continuous bucket dredge |
| 多斗挖掘船 |
|
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| 50. | optimum height of cut |
| 最佳挖掘高度 |
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