For example: Profile mortise lock or double bolt rim lock, the cylinder can operate the square bolt, while the lever can operate the spring latch only.

• 如：弹子插芯门锁或外装双舌门锁，锁头为开、关方舌，执手为开、关斜舌，但有联动机构的，既可开、关方舌，同时又开、关斜舌，而执手仍保持单独开、关执手；