为了摸清铁路隧道开凿民工晚发性矽肺的发病情况,我们对某县1955～1958年参加修建鹰厦、漳龙线的七百名民工,先后经过21年的随访调查,现将结果报告如下。一般情况1955～1958年,某县抽调七百名民工参加修建鹰厦、漳龙铁路隧道开凿工程。采用风钻机械掘进,干 In order to find out the incidence of late silicosis in migrant workers in railway tunnels, we conducted a survey of 700 laborers who built the Yingli and Zhanglong lines from 1955 to 1958 in a certain county. After 21 years of follow-up survey, the results are reported as follows . General situation From 1955 to 1958, 700 counties of migrant workers were dispatched in a county to participate in the construction of Yingxia and Zhanglong Railway tunneling projects. Drilling machine using pneumatic drilling, dry