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（八）放射源，是指除研究堆和动力堆核燃料循环范畴的材料以外，永久密封在容器中或者有严密包层的放射性材料。。safew官方版本下载对此有专业解读
，详情可参考搜狗输入法2026
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Please, please, please stop using passkeys for encrypting user data/。搜狗输入法下载是该领域的重要参考