electric rotary hammer

例句：

1. 1. This electricrotary hammer is very useful for cuttingmetal.
   这把电动旋转锤在切割金属时非常有用。
2. 2. The electric rotary hammeris easy to use and can be usedin various materials.
   电动旋转锤易于使用，可以用于各种材料。
3. 3. The electricrotary hammer is apopular tool for DIY enthusiasts.
   电动旋转锤是DIY爱好者的热门工具。