observobservation 观察；观测；观察资料OBSabbr.观察(=Observation）abbr.瞭望台（=Observatory）abbr.已废的(=Obsolete)abbr.无线电定向标选择器(=Omnibearing Selector)Obstetrical departments产科obscuration coefficient减光系数obstertrical air cushio产科气垫obstetrician obstetrist产科医师observability condition可观测性条件obstetric accommodation产科适应obstertrics-gynecolog(abb.；OBGyN)妇产科学obsterics delivery tabl产科分娩床Obstetrical hysterotomy产科子宫切开术Obstetric transposition产科移位术