
Metallic Materials - Hardness Test - Rockwell Test - Part 2: Superficial Test (scales 15n, 30n, 45n, 15t, 30t And 45t)
出版:Asociacion Espanola de Normalizacion

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Metallic Materials - Hardness Test - Rockwell Test - Part 2: Superficial Test (scales 15n, 30n, 45n, 15t, 30t And 45t)
出版:Asociacion Espanola de Normalizacion
专家解读视频