【关键词】 煤尘作业工人; 胸片 ;尘肺样改变 ;接尘工龄

    [Abstract] Objective： To study the relationship between pneumoconiosis samples of coal dust workers in baishan city and their working years of exposure to dust by using the metrology method of the database of the key occupational disease monitoring system in baishan city. Methods： a city's key occupational disease monitoring system was used as the data source to compare and analyze the effective data in 2017. Results： in 2017， 248 cases were exposed to dust (30-34 years)， and pneumoconiosis sample change accounted for 2.42% ......