| http://www.w3.org/ns/prov#value | - buffer apparatus of FIG. 1, illustrating an extractor arm and a plurality of lifting mechanisms; FIGS. 5 a-5 b are perspective views of a representative lifting mechanism included in the extractor/buffer apparatus of FIG. 1, illustrating the lifting mechanism in non-lifting and lifting configurations, respectively; and FIG. 6 is a perspective view of the extractor/buffer apparatus of FIG. 1, illus
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