| http://www.w3.org/ns/prov#value | - Articulated slide rods 27,29 and 27a,29a are generally square in cross-section being formed of a suitable metallic material, such as aluminum or the like for instance, FIGS. 1-3, and confronting parts of the slide rods are disposed for respective sliding, or gripping and guiding relation or engagement with guides or abutment means 63-69 and 63a-69a, arranged in cover 35 in the manner discussed abo
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