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;
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