Dohc
abbr. 双顶置凸轮轴（Double Overhead Camshaft）
🗣️ 情景例句
autograph copies for the guests at the opening?
在展览开幕时为客人在书上亲笔签名呢
Who is the guy over there?
那边那个人是谁？
OK! Don't worry. I can get it.
不用担心，我能拿下来。