华北大震
Great earthquakes in North China
华北地震
strong earthquakes in North China
earthquakes in north China
North China earthquake
华北地震科学
north china earthquake sciences
华北地震区
North China seismic region
North China seismic area
西北华北地区
Northern and northwestern regions
大地震震级速报实用化讨论
Quick report for great earthquake magnitude
北华大学基础医学院
College of Basic Medicine of Beihua University
北华大学学报
Journal of Beihua University
河北北华律师事务所
hebei beihua law firm shijiazhuang city
华北北部
northern part of North China
the north of North China
northern North China
华北北部地区
The north area of North China
华北大暴雨
heavy rainfall in North China