| 摘要 |
An apparatus having a movable load bearing surface, the apparatus having a frame having a pair of laterally spaced conveying assemblies generally extending along a course of movement; a conveying member defining the load bearing surface supported on said conveying assemblies for movement substantially along said course of movement; a multiplicity of structural elements mounted on the conveying assemblies to impart support to the load bearing surface; and a drive system connected in driving relation to the conveying member operable to drive said conveying member over the conveying assemblies in said course of movement.
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