密封輻射源 mìfēngfúshèyuán sealed radiation source Definitions Defs Origin Strokes Stroke Words Sentences Sents 密封 mìfēng adjectiveverb to seal up to seal up; to seal hermetically or airtight辐射源 輻射源 fúshèyuán radiation source an object, substance, or device that emits radiation, such as cosmic rays or radioactive materials used in medical treatments and industrial testing
