ww419574226 发表于 2017-12-9 14:33:03

ISO 6506-2-2017

ISO 6506-2-2017
Metallic materials--Brinell hardness test--Part 2:Verification and calibration of testing machines

admin 发表于 2017-12-12 16:32:39


谢谢您的分享，金币已奖励!
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