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)
observability indices可观测性指数列
obstetrician ---产科医师.
observability indicies可观测性指数列
obstetrical pelvimeter产科骨盆计, 产科骨盆测量器
obstetric forceps band产科钳牵引带
obstetrical anesthesia产科麻醉[法]