1.Tension on one edge of web, due to tapered roll...(锥形纸卷。) 2.Roll dented...(纸卷缺陷。) 3.Bad splice.(未粘牢。) 4.Press out of alignment.(跑偏。) 5.Manufacturing variations in paper.(质量问题。) 希望能从这几个方面进行回答，谢谢啦！