三维正脊及银质针导热联合组先后采用三维正脊疗法和银质针导热疗法，各2次。
Group c: Three dimensional rectification apparatus treatment and silver needle heat conductive treatment were successively done, each for 2 times.
为了验证模型的可靠性，遵循分析问题的一般规律，先后采用了三种方法进行数学模型的建立。
In order to verify the reliability of the model, following the general rules of analysis, three methods have used to establish the mathematical model.
目前中国移动在全国大部分省市都已先后采用了国产软交换及无线设备，国产设备市场份额大幅度提高。
By now China Mobile has began to use domestic exchanger and wireless equipments in most of the areas around the nation, and the market share of domestic equipments have rose greatly.
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