box end wrench
Longman Dictionary of Contemporary English 5++LDOCE 5++ˌbox end ˈwrench noun [countable] American EnglishTZ a type of wrench with a hollow end that fits over a nut that is being screwed or unscrewed 套筒扳手 SYN British English ring spanner
ˌbox end ˈwrench nounChineseSyllable

