Proving Rings for Calibrating Testing Machines (Classic Reprint)

Excerpt from Proving Rings for Calibrating Testing MachinesThese technical requirements are identical With those in Letter Circular 657, which this specification supersedes. The simplified procedure for the recalibration of rings previously certified is justified by the experience of the past 7 years.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.