壁厚1.5mm-2.5mm之间,双面冲孔成型。孔型2.2cm宽,15cm长,两孔间隔10cm-15cm,即减轻重量,有保证载荷。 型号长度:1000mm/1500mm/2000mm/2200mm/2400mm/2700mm/3000mm/3200mm/4000mm等,同时有连接套,并可连接成任意长度。