Countersinking
[机] 钻锥坑
🗣️ 情景例句
May I have a tour of the cockpit, please?
我能参观一下驾驶舱吗？
Are you pulling my leg?
你在开我玩笑吗？
He suggested that a double railway-tunnel should be built.
他提议建一条双轨隧道，这样就解决了通风问题。