zerol gear

例句：

1. 1. The zerol gear is responsible for the smooth operation of the machine.
   零齿轮负责机器的平稳运行。
2. 2. The zerol gear was designed to improve the efficiency of the machinery.
   零齿轮被设计来提高机械设备的效率。
3. 3. The zerol gear system has been widely used in various industries.
   零齿轮系统在各个行业中得到了广泛应用。