| http://www.w3.org/ns/prov#value | - For example, the biasing device 260 can include a threaded shaft 61 and a knob 62 similar to those shown in FIGS. 1-3, with a shaft end 63 of the shaft 61 rotatably coupled to the first sidewall 22 a of the chassis 20 by a ball joint or other suitable rotational joints known in the art.
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