The chemical milling process forms a tapered portion (18) of the endodontic file (10).

所述化学蚀刻过程形成了牙髓锉(10)的锥形部分(18)。

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An aligning jig to be fitted into the locating hole and the tapered portion is prepared.

一个适应于定位孔和变小部分的对准夹具。

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The inlet of the grilling pipe is connected to an upper portion of the tapered hole , and the air discharging pipe is connected to a lower end of the tapered hole .

烧烤管的入口连接到锥形孔的上部，并且排气管连接到锥形孔的下端。

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