产程活跃期
activephase of birth process
地震活跃期
seismic active period
Active period of earthquakes
seismically active period
地震活跃期幕
epoch and episode of seismicity
第五地震活跃期
5th seismically active period
活跃期镇痛
labour pain relieve active period
强震活跃期
Strong earthquake active period
Active Period of Strong Earthquake
active period
最新活跃期
latest volcanic active stage