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Paper describes an ultrasonic device which is able to extract certain parameters of ultrasonic waves recorded continuously during the setting and hardening of mortar. [465 kB]

Guide to hardness testing of materials. Brinell, Vickers and Rockwell test methods are illustrated, along with hardness conversion tables and charts.

Information about testing of butt welds, condensate, and materials used by gas industry (sinter metals, catalytic burners).