epicycloidal and hypocycloidal gear tooth

例句：

1. 1. The epicycloidal gear is used in the transmission system to transmit power.
   外啮合齿轮用于传动系统中传递动力。
2. 2.The engineer designed a new epicycloidal gear for the machine.
   工程师为机器设计了一种新型的外啮合齿轮。
3. 3.The epicycloidal gear has a unique feature that makes it more efficient and reliable.
   外啮合齿轮具有独特的特性，使其更加高效和可靠。
4. 1. The hypocycloidal gear is commonly used in the drive system to transmit power.
   内啮合齿轮在传动系统中用于传递动力。
5. 2. The engineer designed a new hypocycloidal gear for the machine.
   工程师为机器设计了一种新型的内啮合齿轮。
6. 3. The hypocycloidal gear has a unique feature that makes it more efficient and reliable.
   内啮合齿轮具有独特的特性，使其更加高效和可靠。