key-and-slot

例句：

1. 1. The key-and-slot mechanism allows for easy assembly and disassembly of the device.
   这种键槽机构使得设备易于组装和拆卸。
2. 2.The key-and-slot design ensures that the device can be easily accessed by hand.
   这种键槽设计确保了设备可以通过手轻松访问。
3. 3. The key-and-slot system is used to secure the device in place during transportation.
   这种键槽系统用于在运输过程中固定设备。