The total amplitude of anomaly is about 2mm (the base line of the short levelling is 26 meters).
总异常幅度约为2毫米左右（短水准基线为26米）。
The short-base levelling data at Zhangdaou is analysed by the moving AR spectrum analysis.
用滑动AR谱分析方法对唐山地震前后的张道口短水准资料进行了分析。
The short-base levelling data at Zhangdaou is analysed by the moving AR spectrum analysis.
用滑动AR谱分析方法对唐山地震前后的张道口短水准资料进行了分析。
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