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 ...
It’s now possible to more easily check the hardness of tiny elastomer part, thanks to a novel testing instrument with supersmall motor-driven probes. Ordinary Shore A hardness testers use a conically ...
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