| http://www.w3.org/ns/prov#value | - As a result of my improvedconstruction, it is adjustable nut 35' made possible to utilize only a single piston element in such manner as markedly to simplify the structure and reduce the expense thereof while minimizing the amount of alignment necessary and the objectionable efiects of end play of the piston which, in a multi-piston construction, would change the volume of the chambers.
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