柯林斯词典reamer /ˈriːmə/ 1. N a steel tool with a cylindrical or tapered shank around which longitudinal teeth are ground, used for smoothing the bores of holes accurately to size 钻孔器; 铰床 返回 reamer剑桥词典a tool used to make holes larger or an exact size 扩孔钻；铰刀；打孔钻 返回 reamer