1.Pulmonary samples taken by bronchoscopy from 10 weldor patients were observed under electron microscope.
10例电焊工尘肺病人经支气管肺活检的样品进行电镜观察。
2.How to strengthen the technique certification exam and management for handworked arc weldor
如何加强手工电弧焊工的考证和管理