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Title: poldi harness tester [Go to resource]
Description: Poldi hardness tester, in leatherette case with instructions, 1935, with 9 spare test pieces and instrument head in leather wallet, c.1930, from BR Materials Engineering Group Laboratory, Derby License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: hardness tester Temporal: 1935 Source: Science Museum Identifier: 1992-7580 Go to resource More Like this...
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