hand-operated grinder

例句：

1. 1.This hand-operated grinder is incredibly easy to use.
   这款手操作磨机使用起来非常简单。
2. 2.The hand-operated grinder was the only way to make the dough soft enough for the cake.
   手操作磨机是制作蛋糕面团柔软的唯一方法。
3. 3. I prefer using a hand-operated grinder for grinding coffee beans because it's more precise and efficient.
   我更喜欢使用手操作磨机来研磨咖啡豆，因为它更精确且高效。