... 长寿命放射性母体 long-lived radioactive parent 放射性物质 actinogen; activated agent; activated material; activating agent; material radioactives; radiating objects; radioactive materials; radioactive matter; radioactive su tances; radioactive substances; radioactivematerial; radioactivesu tance; radioaktives material/radioaktive substanz; radiomaterial; substance, radioactive 放射性物；放射性物质 radioactive su tance; radioactive substance ...
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