DIN 50157-2 PDF
Metallic materials – Hardness testing with portable measuring devices operating with mechanical penetration depth – Part 2: Verification and calibration of the testing devices
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Metallic materials – Hardness testing with portable measuring devices operating with mechanical penetration depth – Part 2: Verification and calibration of the testing devices
Deutsches Institut Fur Normung E.V. (German National Standard) , 11/01/2020
DIN 50157-2 PDF
Metallic materials – Hardness testing with portable measuring devices operating with mechanical penetration depth – Part 2: Verification and calibration of the testing devices