摘要 |
A mobile device (16) for releasably and adjustably supporting structures (10) of varying dimensions that are capable of elevating a user above a supporting surface. The mobile device (16) includes a plurality of wheels (20) releasably and adjustably attached to the mobile device (16). The wheels (20) include at least one driven wheel (20). The mobile device (16) includes a driver (45) for driving the at least one driven wheel (20). The driver (45) is controllable by the user.
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