RESULTS The Qi - Qi pellets prepared by extrusion-spheronization were all spheral with smooth surface. The percent of reception was not less than 85%.

结果用挤出滚圆法制备的杞芪微丸圆整度好，大小均匀，收率在85%以上。

It is essential to control assembly and welding deformations for large scale spheral tank with thin wall in order to guarantee spheral tank construction quality.

大型薄壁球罐组装及焊接变形的控制是保证球罐施工质量的关键，文章从球罐半成品、球罐组装及焊接工艺三方面介绍了控制球罐组装及焊接变形的措施。