单词	环状空间--环形孔道
释义	环状空间；环形孔道annulus
随便看	calibration interval calibration laboratory calibration line calibration liquid calibration load calibration mark calibration marker calibration markers calibration mass calibration material calibration measurement calibration measurement capability calibration measurement capability {= cmc} calibration mismatch calibration negative calibration network calibration of system models calibration of transducer calibration of x-ray unit calibration outfit calibration period calibration periodicity calibration plate calibration point calibration potential transformer