| http://www.w3.org/ns/prov#value | - a) the at least one spring is a tension spring that is elongated when it is loaded; b) a first end of the tension spring is in operable contact with a portion of the first segmented retractable door; and c) a second end of the tension spring is in contact with a support attached to the cargo vehicle, such that the tension spring is elongated and tensioned when the first segmented retractable door
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