to be coupled to one another or linked as shown in fig4 the segments 110 are arranged lengthwise or axially with respect to the drum 100 and are coupled using a plurality of coupling means which are also arranged axially each segment 110 is comprised of a plate member having a predetermined curvature or arc based on the diameter of the drum such that when assembled the segments substantially form a circle i e a cross section of a cylinder corresponding to the cylindrical shape of the drum 100 though fabricated as separate components the plate members are roughly equivalent to pieces that would result from axially splitting a single bodied cylindrical drum into a number of equal sized pieces according to the present invention the segments 110 all have the same size and shape so that a specification of the segments can be standardized which facilitates mass production of the segments through a simple and repeatable process furthermore due to the segmentation of the drum 100 the lifters 120 may be integrally formed with the segments 110 and each lifter 120 may be formed at the same position of a corresponding segment preferably to be disposed along one side of the segment thus the number of lifters preferably corresponds to the number of segments 110 such an integrated formation of the segments is in contrast to a conventional drum having a unified structure necessitating separately fabricated and subsequently installed lifters which are coupled to the drum using a plurality of coupling members in manufacturing a dryer.