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1990年3月～1991年6月我们对14所部队医院117名X线工作者(放射组)及半年内未接触X线诊断治疗的健康工作人员55名(对照组)进行了染色体畸变的调查分析,
From March 1990 to June 1991, we investigated the chromosomal aberrations of 117 X-ray workers (radiation group) in 14 military hospitals and 55 healthy workers (control group) who did not receive X-ray diagnosis and treatment within 6 months analysis,