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1·Besides, we bought a power mortise chisel and an electric drill of the latest model as well.

另外我们还买了一架电动榫凿和一个最新式的电钻。

2·Once all the holes are bored, square the ends and the sides of the mortise with a chisel (Photo 15).

所有孔打完后，用凿刀将榫孔边修方正。