The basic principle for nondestructive testing of nodulizing grade in nodular iron and the relationship between ultrasonic speed and nodulizing grade are expounded.
英
美
释义
论述了用无损检测技术判断球墨铸铁球化级别的基本原理,即球化级别与声速的关系,给出了球化级别与声速的关系的数学模型。
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