| http://www.w3.org/ns/prov#value | - No. 411,026 19 Claims. (Cl. 29432.1) ABSTRACT OF THE DISCLOSURE The device is a light-weight portable hand tool to be taken to a job, including forming dies arranged for driving a nut or fastener intermittently through a metallic sheet with displacement of a slug, by means of high frequency vibratory impulses which, in the same single operation, efiect intermittent forming and impacting of the mat
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