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71. | hierarchical data model |
| 分级数据模型 |
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72. | CR [class rate] |
| 分级运费率[ |
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73. | soil productivity grading |
| 土壤生产力分级 |
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74. | hierarchy access time |
| 分级存取时间 |
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75. | sieve classification |
| 筛分级 |
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76. | graduated taxation |
| 分级课税 |
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77. | area classification |
| 区域分级 |
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78. | hierarchical network |
| 分级网络 |
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79. | selling by grade |
| 分级销售 |
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80. | cascaded migration |
| 分级偏移 |
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