为了进一步提高对吸入煤矽混合粉尘工人胸部 X 线表现的认识,为制订我国煤矽肺诊断标准提供根据,我们在煤炭部劳资司和科技局的直接领导下。由山东、黑龙江、四川省煤炭局卫生处及唐山煤矿医学院科研处具体组织,按照统一要求搜集了该类工人胸 In order to further enhance the understanding of chest X-ray performance of workers exposed to coal-silica mixed dust, and to provide a basis for formulating the diagnostic criteria for coal silicosis in China, we are under the direct leadership of the Labor Department and the Technology Bureau of the Ministry of Coal Industry. By Shandong, Heilongjiang, Sichuan Provincial Department of Health Coal Bureau and Tangshan Coal Mine Medical College scientific research organization specifically organized in accordance with the requirements of such workers collected chest