煤工尘肺合并类风湿病调查杨德昌，翟献民，李宝平，丛玉东，姚淑荣作者对两个不同煤种的煤矿进行煤工尘肺（包括煤肺、煤矽肺和矽肺）合并类风湿病的调查。一、对象与方法调查步骤：对北京门头沟矿的８８．８％的现症病人，及山东孙协矿的７６．７％的现症病人进行询问病... Investigation of Coal Workers’ Pneumoconiosis Patients with Rheumatoid Diseases Yang Dechang, Zhai Xianmin, Li Baoping, Cong Yudong, and Yao Shurong The authors investigated the co-rheumatoid diseases of coal worker’s pneumoconiosis (including coal lung, coal silicosis and silicosis) from two coal mine of different coal types. First, the object and method of investigation steps: Beijing Mentougou 88.8% of patients present disease and Shandong Sun Association mine 76.7% of the disease patients are asked disease ...