['hæʃmɑ:k]
[美](表示士兵已服役年数的)军役袖章
军役袖章上的斜条(每条表示服役三年或四年)

[ noun ]
an insignia worn to indicate years of service
<noun.communication>

hashmark \hash"mark`\ n. (Mil.)
an insignia worn on the uniform to indicate years of service.

Syn: service stripe, hash mark.
[WordNet 1.5]