柯林斯詞典box spanner 1. N a spanner consisting of a steel cylinder with a hexagonal end that fits over a nut: used esp to turn nuts in positions that are recessed or difficult of access 琯鉗子 返回 box spanner劍橋詞典a metal tool with a six-sided end that is used for tightening nuts 套筒扳手，琯鉗子 返回 box spanner