以下信息适用于汽车凸轮轴驱动器、分配器驱动器或其他可能需要同步的引擎盖下驱动器。对于需要同步的其他动力传输驱动，请参阅由橡胶制造商协会（RMA）、机械动力传输协会（MPTA）和加拿大橡胶协会（RAC）联合出版的使用同步带（MXL、XL、L、H、XH和XXH带段）的驱动规范（IP 24/1978）。

The following information applies to automotive camshaft drives, distributor drives, or other underhood drives that may require synchronization. For other power transmission drives requiring synchronization, refer to Specifications for Drives using Synchronous Belts (MXL, XL, L, H, XH and XXH belt sections) (IP 24/1978), published jointly by the Rubber Manufacturers Association (RMA), the Mechanical Power Transmission Association (MPTA), and the Rubber Association of Canada (RAC).