... the phenomenon of collapse during the return trip. 2,Base Belt Structure: Four Parts: Top cover rubber,bottom cover rubber, ... . 4,USEDWidely used in coal,minging,harbour,metallurgy,power,chemical,etc field for conveying materials.5,CORRUGATED SIDEWALL CONVEYOR BELT ... belt occurred the phenomenon of collapse during the return trip. Base Belt Structure: Four Parts: Top cover rubber,bottom cover rubber, ...