obs.obsolete; abbr.;obstetrician
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)
Obstetric surgery产科手术
obserquent stream逆向河
Obstetric nursing产科护理
obstetric bed pan产科便盆
obstetrical palsy产瘫
obstetric forceps产钳,产科钳
obsolescence loss陈旧损耗
obstetrical shock产科休克
obscuration ratio遮拦比
obsolescence free长时适用