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
Mmm-hmm.
嗯。
Do you have a try?
你有试过吗？
Go down this street until you reach the second traffic lights. Turn right.
顺这条街往前走，直到第2个红绿灯处。往右拐。