A shipping carrier having a frame with at least one elongated rectangular tube having an outer periphery. The conversion kit includes at least one endless loop belt conveyor guide; and at least two conveyor guide mounts. A zipper is provided in the fabric upper member to form an openable seam enabling the wearer to remove the athletic shoe and attach the cover on the wearer’s foot without removing the cover from the shoe. Also the CD drive is capable of writing data on the data track according to the writing clock. A cumulative value is calculated for each tool by sequentially adding the weight values of each lot in the lot list and keeping the cumulative value above or equal to zero. In order to supplement volumes of the respective air springs 5 without addition of new tank equipment, an inner space of the axle beam 1 is divided by an intermediate partition 12 into two divided spaces which are respectively communicated as surge tanks 13 with the air springs 5 for supplement of the volumes of the air springs 5.