Such methods as comparison, analysis, abstract and generalization, which are used for collecting and sorting out the data, are logical methods.

至于收集整理资料所用的诸如比较、分析、抽象、概括等方法，本身就是逻辑方法。

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By searching and sorting out the data of existing WIG, the statistic relationship of takeoff weight and empty weight as well as other parameters are studied.

通过现有地效飞行器数据和资料的整理，研究其起飞重量与空机重量以及其他各项参数的统计关系。

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By searching and sorting out the data of existing WIG, the statistic relationship of takeoff weight and empty weight as well as other parameters are studied.

通过现有地效飞行器数据和资料的整理，研究其起飞重量与空机重量以及其他各项参数的统计关系。

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