它僅需設一個通道,密封性好,美觀實用,是空間利用率最高的一種貨架,主要適於檔案館\圖書館\銀行\企業資料室等.

Only one atwisle to be used, the highest space utilization,beautiful and dignified,sealing better,widely used in archives, library, bank and company document, etc.