密封辐射源 mìfēngfúshèyuán sealed radiation source Definitions Defs Origin Strokes Stroke Words Sentences Sents 密封辐射源 密封輻射源 mìfēngfúshèyuán sealed radiation source radioactive material that is permanently sealed in a capsule or bonded in a solid form to prevent leakage
密封辐射源 密封輻射源 mìfēngfúshèyuán sealed radiation source radioactive material that is permanently sealed in a capsule or bonded in a solid form to prevent leakage
