| http://www.w3.org/ns/prov#value | - The first and second slides 1 1 , 14 may be fixed to the stationary plate 12 and the rotating plate 13 respectively by respective cylindrical sleeves 22, each allowing respective moving cylinders 21 to slide therein, which sleeves are fastened by respective anchor plates 23 to the rotating plate 13 or the stationary plate 12 by means of common fastening means, such as by welding.
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