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炉子修搪好后,必须用量规量一量炉子的内径是否合乎要求。附图为一种简单的活动量规,全部用木料做成,右边尺上
After the furnace is repaired, it is necessary to use the gauge to measure whether the inner diameter of the furnace is satisfactory. The figure is a simple activity gauge, all made of wood, on the right foot