作者: Michel Vincent
DOI:
关键词: Structural engineering 、 Process (computing) 、 Lock (firearm) 、 Envelope (motion) 、 Engineering 、 Mechanism (engineering) 、 Magnet 、 Composite material
摘要: The binder comprises two faces, a back and flaps respectively extending face adapted to be folded close the binder, an external envelope of plastic material, ring mechanism fixed inside back, magnetic closure arranged on flaps, this being constituted by magnet positioned in housing defining flap, metallic plate second flap. have identical dimensions placed so that their perimeters coincide applied one against other.