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EDSTROM报告,在加拿大西拉布拉多煤湖区的采矿工人中,发现了48名尘肺,平均年龄38岁,最短工龄11个月,最长8年。粉尘中既含石英,又含石
The EDSTROM report found 48 pneumoconiosis workers in the coal mines of the West Labrador Lake in Canada, with an average age of 38 years and a minimum of 11 months and a maximum of 8 years. Dust contains both quartz and stone