| http://www.w3.org/ns/prov#value | - d including the tool, first control means including,a control lever operatively connected to said subassembly means for pivoting same about said second pivot axis, whereby the tool is raised or lowered in said opening to a first elevation with respect to the tabletop in a relatively quick setting manner, and locking means for securing said control lever at a position corresponding to said first el
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