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No abnormity was found in the metallographical analysis and hardness test.
金相和硬度分析未发现明显异常组织和硬度分布.
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The metallographical structure of the pipes become widmanstatten and its mechanical properties are dropped notably.
管材的金相组织转变为魏氏组织,使其机械性能显著降低.
The geometrical characteristics analysis of grain is the important base of metallographical analysis.
晶粒的几何特征度量是金属性能分析的重要基础.
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