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HARDNESS, as recent correspondence in NATURE (vol. cvi., pp. 377, 440, 534, 599, 662, November, 192o–January, 1921) has shown, is a subject of interest to both the engineer and the physicist. Whatever ...
CAG flags concerns over Lucknow Metro's rail quality, with IIT Kanpur tests revealing hardness levels significantly below Indian Railway standards. Depot rails tested between 229-242 BHN and main line ...