开键槽

例句：

1. 1. The carpenter carefully cut a keyway into the wood.
   木匠小心翼翼地在木头上切了一个槽。
2. 2. The machine has a built-in keyway for easy assembly.
   这台机器有一个内置的槽，便于组装。
3. 3. The keyway on the lock is designed to fit this key.
   锁上的槽设计成可以适配这个钥匙。