| http://www.w3.org/ns/prov#value | - a housing; an assembly having a first end pivotably mounted in said housing and a second end disposed opposite said first end; a sensor detecting a current position of said assembly with respect to said housing; a pivoting mechanism disposed in said housing for pivoting said assembly with respect to said first end, said pivoting mechanism including an electric motor, a worm screw extending at leas
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