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2. Hach Company - Wikipedia

   en.wikipedia.org/wiki/Hach_Company

   Hach Company manufactures and distributes analytical instruments and reagents used to test the quality of water and other liquid solutions. Manufactured and distributed worldwide, Hach systems are designed to simplify analysis by offering on-line instrumentation, portable laboratory equipment, prepared reagents , easy-to-follow methods, and ...

3. Category:Hardness tests - Wikipedia

   en.wikipedia.org/wiki/Category:Hardness_tests

   Tablet hardness testing; Turner-sclerometer; V. Vickers hardness test This page was last edited on 16 March 2013, at 18:53 (UTC). Text is available under the ...

4. Hardness comparison - Wikipedia

   en.wikipedia.org/wiki/Hardness_comparison

   A variety of hardness-testing methods are available, including the Vickers, Brinell, Rockwell, Meyer and Leeb tests. Although it is impossible in many cases to give an exact conversion, it is possible to give an approximate material-specific comparison table for steels .

5. Indentation hardness - Wikipedia

   en.wikipedia.org/wiki/Indentation_hardness

   Knoop hardness test (HK), for measurement over small areas, widely used to test glass or ceramic material. [8] Janka hardness test, for wood; Meyer hardness test; Rockwell hardness test (HR), principally used in the USA. HRA, HRB and HRC scales are most widely used. [9] Shore hardness test, for polymers, widely used in the rubber industry. [10]

6. Leeb rebound hardness test - Wikipedia

   en.wikipedia.org/wiki/Leeb_rebound_hardness_test

   The Equotip (later on also called simultaneously as Leeb method) rebound hardness test method was developed in the year 1975 by Leeb and Brandestini at Proceq SA to provide a portable hardness test for metals. It was developed as an alternative to the unwieldy and sometimes intricate traditional hardness measuring equipment.

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   This popular vitamin C serum is on sale for just $10: '60 is the new 40' AOL. Glamorous gold jewelry staples you can wear on repeat — all under $15. AOL.