n.
套袖

[ noun ]
a sleeve that extends in one piece to the neckline of a coat or sweater with seams from the armhole to the neck
<noun.artifact>

raglan sleeve \rag"lan sleeve`\ (r[a^]g"lan sl[=e]v`), n.
A sleeve joined to the body of a garment by a long slanting
seam starting at the neck and continuing around the armhole.
Contrasted to a {set-in sleeve}.
[PJC]