n. 尾座

[ noun ]
support consisting of the movable part of a lathe that slides along the bed in alignment with the headstock and is locked into position to support the free end of the workpiece
<noun.artifact>

Tailstock \Tail"stock`\, n.
The sliding block or support, in a lathe, which carries the
dead spindle, or adjustable center. The {headstock} supports
the live spindle.