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