Material of main equipment: 1. Roller material: High grade NO. 45 forged steel, 2. Plated hard chrome on the surface of roller with thickness 0.05mm. 3. Active shaft material: High grade NO. 45 carbon wrought steel at diameter 72mm. 4. Cutting blade: Cr12 mould steel with quenched treatment. 5. They are widely used as the roof of garden like factory, hotel, exhibition center, villa, civil construction, etc.
