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据报道(Arch Occup Environ Health 53:189,1934):慢性铅接触内剂量≥70微克/分升血铅可在接触人群中引起NCV的显著改变,
It has been reported (Arch Occup Environ Health 53: 189, 1934) that chronic lead exposure to an internal dose of ≥70 μg / dL lead to significant changes in NCV in exposed populations,