| 摘要 |
The device comprises load bearers running on a rail unit, with different bearers abutting one another and able to run over and under each other. The loading in and out works on the basis of 'first in, last out'. The device has carriages (2,3,4) that are moveable on a rail unit comprising two rails (6-11) for each carriage. The upper load bearer (3) is somewhat wider than the lower load bearer (2) and the upper load bearer wheel support extends downwards to the rails outside the lower load bearer. |
