| http://www.w3.org/ns/prov#value | - Bifurcate the front end of this lever and make the right-side faces of the forks perpendicular' and the left-side faces inclined, the upper one to the left upward and the under one to the left downward, with the under edge of the upper fork and the upper edge of the under fork `sharp like saw-teeth, as shown in Figs. 1 and 2, particularly in Fig. 2.
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