Features:
1) Good-sized thermo-calender for non-woven
2) Laser cutting machine for thermo-calender roller 
    promotes the rollers' quality
3) The depth reaching more than 5mm of hard layer processed 
    after quenching is much better than the nitrided layer 0.4~0.5mm 
    from old technics
4) There is no damage when welding residue and knives
5) The pattern won't be changed by long use
6) More advantages:
    a) Accurate pattern
    b) Choosing patterns, depth, and angle according to your requirements
7) Synchronized quality to the European thermo-calender rollers