Extremely, the cast iron board was used thin, the storm door and the occulter, Out the entrance door and the extraordinary door

摘要

(57) Abstract (Modified) Objective It has the character which is superior, the storm door, the occulter and entrance and exitThe opening door and the extraordinary door are offered. Constitution Entirely or rolling extremely making use of the cast iron board to part, thin denselyThe product of the re and others is obtained. Advantages Because soundproofing, vibration-proof Characteristic is a cast iron board, it was superiorThe passenger space can be made.