这类技术仅需要更换部分关节。

This technique requires the replacement of that component only.

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可钻，填补蛀牙，提取牙齿，并更换部分牙冠。

May drill and fill cavities, extract teeth and replace portions of tooth crown.

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现经改良，更换部分零件后，可以脱小杏仁的外皮。

Now after improving, changing parts of spare partses it also can take off the cortex of small almond.

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