Lead poisoning of children have some different among different areas.

儿童铅中毒在不同地区存在一定差异。

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Objective To study mental characteristics of children with light lead poisoning.

目的探讨轻度铅中毒儿童的智力特征。

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Objective To study mental characteristics of children with light lead poisoning.

目的探讨轻度铅中毒儿童的智力特征。

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