forming craftwork of C purlin machinery Decoiler --- Guide,flatting --- Roll forming --- cutting-to-lengh --- ... expanding , capacity:5T2,Guide Rack: two pairs of lever rollers and four pairs of standing rollers.3,Flatting number: 9 sets4,Roll ... torii type, material:HT200c, Roll forming rack: 12 setsd, The diameter of the roller axis:φ70mm, roller surface:400mmMaterial: 40Cr quenching treatment ...