患者 ,男 ,6 3岁 ,从 1958年 6月至 196 0年 5月在搞公路建设中 ,参加挖土方及机械破碎石米 ,接触吸尘工龄 2年 ,患者诉 :当时“干式作业 ,粉尘到处飞扬 ,浓度很高 ,无防尘措施”。 196 3年改为行政干部工作 ,从此后脱尘工作至今。 1989年以来 ,经常有咳嗽、气促、胸闷、胸痛症 Patient, male, 63 years old, from June 1958 to May 1960 engaged in highway construction, participated in excavation of earth and machinery broken stone meters, exposed to vacuum for 2 years, the patient v. At that time “dry work, Dust flying everywhere, high concentrations, no dust-proof measures. ” 196 three years to administrative cadres, since then dust work so far. Since 1989, often have cough, shortness of breath, chest tightness, chest pain