Tappet
n. 梃杆, 凸轮从动件\\n[机] 挺杆
📖 牛津释义
tappet
n
projection in a piece of machinery that causes a certain movement by tapping against sth, used eg to open and close a valve 挺杆.
🗣️ 情景例句
He's a friend.
他是位朋友。
I wonder what he's doing.
我不知道他在做什么。
Hi, Li Lei! How are you?
嗨，李垒！你好吗？