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| 31. | complete set of hydraulic excavator |
| 水力挖掘机组 |
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| 32. | excavation bottom |
| 挖掘基底 |
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| 33. | footing excavation |
| 基础挖掘 |
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| 34. | bench excavation |
| 台阶式挖掘 |
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| 35. | tap production potential |
| 挖掘生产潜力 |
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| 36. | belled excavation |
| 钟形挖掘 |
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| 37. | Alternative methods to that shown in Fig. 16, for supporting open excavations, are often employed. |
| 除图16所示的方案外,人们经常使用其他明挖掘支撑法。 |
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| 38. | braced excavation |
| 支撑式挖掘 |
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| 39. | Excavate an archaeological site. |
| 挖掘考古现场 |
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| 40. | continuous bucket dredge |
| 多斗挖掘船 |
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