Concave cutter
[机] 凹面铣刀
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
🗣️ 情景例句
We've got a forty-minute drive into the city.
我们还要开四十分钟的车到城里去。
When the lights went out, I was washing my hair.
当熄灯的时候，我在洗头。
I have a headache, and she has a stomachache.
我头疼，她胃疼。