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File:NIST hardness reference.jpg

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Description
English: Hardness Standard Reference Materials from NIST
Date circa 1997
date QS:P,+1997-00-00T00:00:00Z/9,P1480,Q5727902
Source http://www.nist.gov/msel/metallurgy/materials_performance/hardness_srms.cfm
Author NIST
Permission
(Reusing this file)
Public domain
This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.

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current11:28, 21 August 2009950 × 810 (826 KB)Pieter Kuiper{{Information |Description={{en|1=Hardness Standard Reference Materials from NIST}} |Source=http://www.nist.gov/msel/metallurgy/materials_performance/hardness_srms.cfm |Author=NIST |Date=1997 ? |Permission={{PD-USGov-NIST}} |other_versions= }} [[Category

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