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| 41. | scamper up the steps |
| 蹦跳着上台阶 |
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| 42. | terraced houses |
| 台阶式房屋 |
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| 43. | flat-back stope |
| 逆台阶工作面 |
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| 44. | dock-wall altar |
| 干船坞台阶 |
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| 45. | bench excavation |
| 台阶式挖掘 |
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| 46. | cylinder ridge reamer |
| 汽缸台阶铰刀 |
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| 47. | Mind (ie Don't trip over) that step! |
| 小心那个台阶! |
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| 48. | inside step design |
| 内台阶设计 |
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| 49. | inwardly protruding shoulder |
| 内突台阶 |
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| 50. | nominal step value |
| 标称台阶值 |
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