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 鑽孔器; 鉸牀 返回 reamer剑桥词典a tool used to make holes larger or an exact size 擴孔鑽；鉸刀；打孔鑽 返回 reamer