| http://www.w3.org/ns/prov#value | - Support and guidance may be achieved for example by various arrangements of wheels, rails, skid plates, air bearings, magnetic forces, and the like as shown in the embodiments illustrated in FIGS. 4A-4F. FIG. 4A illustrates a carrier C1 in accordance with an embodiment where the carrier frame CA has wheels CWV and CWH mounted thereon for providing both vertical and lateral support.
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