The metal box has two open edges and a mechanized system at the edge. It can connect other similar boxes to form a continuous structure. The inner diameter of the metal box forms a corridor or main passage, and there are two or more small pipes with air movement system. E, every box with a door

摘要

Metal Box that has two Open sides, whose edges is a Tongue and Groove System for attaching other similar boxes, forming a continuous structure.With an internal conduit forms a Corridor or Passageway and main channels under two or more Systems of Air Movement, each BOX with doors on both sides.