We all know that lead door is not only a kind of can resist impact collision wave or the heavy door, but also stop the harm of radiation on the human body.
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铅对人体的危害主要有环境类、职业类、生活类、药物类、母源类五种方式。
The harm of lead to the human bodies is classified as environmental type, occupational type, living type, medical type and mother source type.