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The architecture of the helmet
     Hat shell: take the hit, falling objects and the human body.
      Hat band: keep safety helmet on his head a certain position.
      Top with: scattered wallop, keep the cap shell floating, in order to disperse.
      After the band: the head band locking device.
      Jaw belt: auxiliary safety helmet condition and location.
      Absorb sweat band: the sweat.
      Cushion: shock occurs, reduce the impact force.
      Vertical spacing: reflects the cap shell gap between the inside and the top of the head. Is too small, poorly ventilated, too big hat shell weight increase, lead to an unstable helmet on his head.
      Horizontal spacing: when there is a side force in shock, provide a buffer space. At the same time is also the cooling channels.
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