To explore the risk factors of pulmonary tuberculosis (PT) in the enterprises in Changde and to lay foundation for their prevention and control.

[目的]探索影响工矿企业工人结核病发病的危险因素，为结核病预防提供参考依据。

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One such movement is the Landless Movement or Movement of the Landless Workers (MST), which was an integral part of the foundation of the PT.

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