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本物品は、建物敷地出入り開口全面における門扉である。 使用状況を示す参考正面図に記す支柱梁材に支持された上部レール内を車輪が走行する事により、吊り材にて吊るされた複数枚の建具を平行移動させて使用される。下部レールにより建具毎に連鎖支持され、全体の下振れを防止する。This article is a gate on the entire entrance/exit opening of the building site. As the wheels run in the upper rail supported by the support beams shown in the reference front view showing the usage situation, multiple pieces of fittings suspended by the hanging members are moved in parallel when used. Each fixture is chain-supported by the lower rail to prevent the entire system from swinging downward.