选择96名密闭容器焊接作业男性工人为观察组,另选无粉尘接触史的84名男性工人为对照组。焊接现场粉尘测定浓度平均45.6mg/m~3,粉尘分散度测定<5μm粉尘粒子占81.5％。两组X线胸片异常表现(肺门阴影增大、增密,肺纹粗乱,O~+.O~+～1)检出串观察组均明显高于对照组(P<0.01,且随接尘工龄延长而加重。观察组各项肺功能指标均低于对照组,MVV两组比较差异有显著性(P< A total of 96 male workers in the airtight container welding operation were selected as the observation group, and 84 male workers with no dust exposure history were selected as the control group. The concentration of dust on the welding site averaged 45.6mg / m ~ 3, and the dust dispersity was less than 5μm, accounting for 81.5%. Two groups of X-ray abnormalities (hilar shadow increase, densification, lung pattern coarse disorder, O ~ + .O ~ + ~ 1) were detected in the observation group were significantly higher than the control group (P <0.01, and With the extension of the longer service life and aggravate the observation group of lung function indicators were lower than the control group, MVV two groups was significantly different (P <