c/Hardness tests

Information
lexicalization	eng: Hardness tests
subclass of	(noun) trying something to find out about it; "a sample for ten days free trial"; "a trial of progesterone failed to relieve the pain" test, tryout, trial, trial run
has instance	e/Barcol hardness test
has instance	e/Berkovich tip
has instance	e/Bloom (test)
has instance	e/Leeb rebound hardness test
has instance	e/Meyer hardness test
has instance	e/Meyer's law
has instance	e/Nanoindenter