役用牛

Draft \Draft\, a.
1. Pertaining to, or used for, drawing or pulling (as
vehicles, loads, etc.). Same as {Draught}; as, a draft
horse.

2. Relating to, or characterized by, a draft, or current of
air. Same as {Draught}.

Note: The forms draft and draught, in the senses above-given,
are both in approved use.

{Draft box}, {Draft engine}, {Draft horse}, {Draft net},
{Draft ox}, {Draft tube}. Same as {Draught box}, {Draught
engine}, etc. See under {Draught}.