| http://www.w3.org/ns/prov#value | - being selectively actuated for lateral movement as said expansion means is actuated; (v) said pivoting means including a pivoting actuator and a bar linkage; said pivoting actuator being mounted on said flatbed portion lower surface; said linkage connecting said pivoting actuator to said crossbar for selective pivoting of same; (c) first and second contraction cuts in said crossbar means upper sur
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