Peregni Walls Can Be Static and Mobile, OpaQue and Translucent. By the Method of Construction, The Internal Walls Are Complete and Frame.
Full Internal Walls Are Built of Brick, Glass Blocks, Concrete, Anded Concrete, Expanded Clay Concrete and Other Things. The Walls are Durable, Good Sound Insulation. Serious Disadintages are Large Weight, Heavy in Dimantling.