A new method for the trace of standard ring gauge is proposed.

提出一种新的标准环规溯源方法.

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That includes aligning the ring gauge before measuring for dia.

那包括在测量直径之前排校准环规.

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As a matter of interest, what size does the calibration certificate say the ring gauge is?

稍微有点好奇, 环规校准报告说环规尺寸是所少?

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