| http://www.w3.org/ns/prov#value | - rth pivots; two tension cartridges, each tension cartridge being mounted to one of the arms, respectively, and including two ends, one of the two ends being pivotally held to the respective first link longitudinally outwardly from the respective first and second pivots beyond the first pivot and the other of the two ends being pivotally held to the respective third link, a line between the two end
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