| http://www.w3.org/ns/prov#value | - The housing 136 encloses the worm gear 100 and the worm 120 except for the hexagonal head 128 of the worm 120 which projects outwardly from the housing 136 such that a wrench or other device may be attached to the head 128 by an operator to provide selective rotation of the worm 120.
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