Flat lock 
 System style: strong sense of hierarchy, the classical European style design flexibility 
 Suitable shape: flat, convex arc, concave arc, cone, and other irregular shapes 
 Applicable to buildings: public buildings, residential buildings and other special-shaped building roof, wall 
 General Width: 200mm 300mm 400mm 500mm 600mm 
 Common thickness: 0.7mm 0.8mm 
 Common materials: titanium-zinc plate, aluminum magnesium manganese plate, copper Pacific 
 System advantages: the laying of flexible and unique three-dimensional effect, suitable for a variety of architectural shapes 
 Apply gradient: usually requires the laying of waterproofing materials