welding slags meaning in English

电焊渣

When installation should be careful and remove the cutting edges , burrs or welding slags on the connecting flange , to avoid to damage the inner lining rubber
安装时小心轻放，并且要清除连接法兰上的尖角、毛刺或焊渣等，避免损伤内衬胶。
Before the pump installation , it is necessary to remove the impurities in the pipeline thoroughly like welding slag and metal scraps lest they are sucked into the pump causing accidents when the pump starts
泵安装前一定要彻底清除管路内的杂物，如：焊渣、金属屑等，以免泵起动时被吸入造成事故。