The paint in that old house contains a dangerous amount of lead.
那所旧房子的涂料含有危险的铅含量。
His goal was to determine the amount of lead and how it compares to u.
他的目标是确定铅的量,以及怎样和美国的标准相比较。
It is particularly indicated for treating concentrates with a significant amount of lead.
它的特别之处是用大量的铅处理锌精矿。
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