实践证明，该系统节能效果突出，改善了陶瓷元器件的生产工艺，具有较大实用价值。
It is proved in practice that the system has outstanding energy conservation effect, the produce technology is improved.
因此，网页自动分类是一项具有较大实用价值的方法，也是组织和管理数据的有效手段。
Therefore, Web classification is not a method with great practical value, but also is an effective means of organizing and managing data.
所得到的最佳参数、工作区域图及工作效率曲线对氨吸收制冷流程和操作参数的选择具有较大实用价值。
The obtained optimum parameters, working region diagrams and working efficiency curve diagrams have more practical value in selecting AAR process and operating parameters.
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