| http://www.w3.org/ns/prov#value | - In accordance with a second aspect of the present invention, the above and other objects can be accomplished by the provision of a caster skate apparatus which is propelled in a direction changeable manner by use of both feet of a rider for providing the rider with exercise effect, comprising: a front board to support one foot thereon; first and second rollers mounted to the underside of the front
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