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本文主要阐述了利用影象法对60°圆锥管罗纹塞规(NPT)的基面中径进行间接测量的原理、方法、过程及数据处理方法。
This paper mainly expounds the principle, method, process and data processing method of indirect measurement of base diameter of 60 ° conical tube rib plug gauge (NPT) by using image method.