以这种分离方式获得的放射核素常用不加载体(no carrier added)来标志它们的质量品，即以前的无载体(carrier-free)放射核素。
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no-carrier added 非载体加入的
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Consumers have to call up their carrier after the phone is stolen to get it added to the No-Service List.
FORBES: There's Finally A Way To Make Your Phone Useless After It's Stolen
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