粗齿锯

例句：

1. 1. He used a big, heavy-duty saw to cut down the tree.
   他用一把大、重型锯子砍倒了那棵树。
2. 2. The heavy-duty chainsaw was perfect for cutting through tough branches.
   这把重型链锯非常适合切割硬树枝。
3. 3. They used a heavy-duty saw to clear away the debris from the construction site.
   他们用一把重型锯清理了建筑工地上的杂物。