... the benefit and save the time limit for a project4) Pressing steel panel with the clear line, and many colors for ... 40-50dB, it is the most effective sound insulation material7) Pressing steel panel can be arbitrariness incise, it can satisty the ... 5,600kg/cm2), adding the most advanced design and roll pressing moulding, it gets the best structure character9) Improves speediness and springiness ...