lead proof

例句：

1. 1. The company issued a new product with a lead proof label.
   该公司发布了一款带有铅印证明标签的新产品。
2. 2.The government has mandated that all children's toys must be lead proof.
   政府已经要求所有儿童玩具都必须是铅印证明的。
3. 3. The manufacturer insisted on providing a lead proof certificate for the product.
   制造商坚持为该产品提供铅印证明证书。