plastic moulded gear

例句：

1. 1.The plastic moulded gear is used in the machine to reduce friction.
   这种塑料模具齿轮被用于机器中以减少摩擦。
2. 2. The plastic moulded gear is easy to install and maintain.
   这种塑料模具齿轮易于安装和维护。
3. 3. The plastic moulded gear is widely used in industrial machinery.
   这种塑料模具齿轮在工业机械中广泛使用。