| http://www.w3.org/ns/prov#value | - In a trailer vehicle having a body a wheel assembly comprising a pair of laterally spaced axle supports connected to said body, each axle support including a bearing member, an axle journalled on said bearing members for pivotal movement about a longitudinal axis, a castering Wheel structure disposed on opposite sides of said axle, each castering wheel structure including a castering socket connec
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