目的：探讨铅接触者尿绒毛膜酶活性的变化及其意义。

Objective: To investigate the changes of the activities of urine brush border enzymes in lead exposed workers and their significances.

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结论：尿绒毛膜酶活性升高是铅致早期肾损害的敏感指标。

Conclusion: The rising oft he activity of enzymuria is a sensitivity indicator to kidney damage by lead.

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