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
there's a lot to do around the house,
这屋里有很多事可做，
A handful of common sense is worth bushel of learning.
一点小常识常胜过很多有价值的学问。
I gave much time to the old car.
我在这辆破车上花了不少时间。