| http://www.w3.org/ns/prov#value | - m for controlling the folding bars; FIGS. 60, 6b, 6c, and 6d show steps in the sequence of a front-fold operation; FIGS. 7a, 7b, 7c, and 7d show similar steps in the sequence of a back-fold operation; and FIG. 8 is a circuit for actuating and timing the system and mechanism.
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