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81. | scamper up the steps |
| 蹦跳着上台阶 |
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82. | dynamic terrace precision |
| 动态台阶精度 |
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83. | dock-wall altar |
| 干船坞台阶 |
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84. | landscape terrace |
| 园景台阶 |
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85. | flat-back stope |
| 逆台阶工作面 |
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86. | terraced houses |
| 台阶式房屋 |
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87. | bench excavation |
| 台阶式挖掘 |
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88. | inwardly protruding shoulder |
| 内突台阶 |
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89. | cylinder ridge reamer |
| 汽缸台阶铰刀 |
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90. | heading-and-stope mining |
| 正台阶回采 |
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