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机译:
Univ Surrey, Dept Phys, Ctr Nucl & Radiat Phys, Guildford GU2 7XH, Surrey, England;
Univ Surrey, Dept Civil Engn, Ctr Environm Hlth Engn, Guildford GU2 7XH, Surrey, England;
Naturally occurring radioactive materials; NORM; Gamma-ray spectrometry;