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现行 GB/T 9450-1988
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钢件渗碳淬火有效硬化层深度的测定和校核 Determination and verification of the effective depth of carburizod and hardened cases of steel parts
发布日期: 1988-06-25
实施日期: 1989-03-01
废止日期: 2006-01-01
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起草单位: 北京机电研究所
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